Results from the 2015 National Survey on Drug Use and Health: Detailed Tables, SAMHSA, CBHSQ

Illicit Drug Use Tables – 1.1 to 1.158
Tobacco Product and Alcohol Use Tables – 2.1 to 2.88
Risk and Protective Factor Tables – 3.1 to 3.38
Incidence Tables – 4.1 to 4.20
Substance Use Disorder and Treatment Tables – 5.1 to 5.62
Miscellaneous Tables – 6.1 to 6.107
Trend Tables – 7.1 to 7.51
Adult Mental Health Tables – 8.1 to 8.87
Youth Mental Health Tables – 9.1 to 9.17
Adult Mental Health Trend Tables – 10.1 to 10.41
Youth Mental Health Trend Tables – 11.1 to 11.6
Sample Size and Population Tables – 12.1 to 12.11

List of Tables Containing Standard Errors and P Values - Table Types C, D, and P (If Applicable)

Illicit Drug Use Tables – 1.1 to 1.158
Tobacco Product and Alcohol Use Tables – 2.1 to 2.88
Risk and Protective Factor Tables – 3.1 to 3.38
Incidence Tables – 4.1 to 4.20
Substance Use Disorder and Treatment Tables – 5.1 to 5.62
Miscellaneous Tables – 6.1 to 6.107
Trend Tables – 7.1 to 7.51
Adult Mental Health Tables – 8.1 to 8.87
Youth Mental Health Tables – 9.1 to 9.17
Adult Mental Health Trend Tables – 10.1 to 10.41
Youth Mental Health Trend Tables – 11.1 to 11.6
Sample Size and Population Tables – 12.1 to 12.11

Introduction

Results from the 2015 National Survey on Drug Use and Health: Detailed Tables is a collection of tables presenting national estimates from the National Survey on Drug Use and Health (NSDUH). Starting with the 2015 NSDUH, the detailed tables are now a combination of the prior detailed tables and the mental health detailed tables. The detailed tables now consist of 12 subject matter sections, with Sections 1 to 7 mapping to the sections from the previous years' detailed tables and Sections 8 to 11 mapping to the prior year's mental health detailed tables. Section 12 contains sample size and population total tables combined from both sets of tables. The 2015 detailed tables include various types of tables, including 2-year trend and multiyear trend tables. Due to a partial redesign in 2015, many measures are no longer comparable with previous years, but the 2-year trend table format was retained in the detailed tables in order to help illustrate this lack of comparability. Further details about the 2015 redesign and its impact on estimates can be found in the 2015 NSDUH redesign changes and impact section below. More detailed information about these table changes can be found in the table presentation section below.

The 2015 detailed tables present information for youths aged 12 to 17 and adults 18 or older on drug, alcohol, and tobacco use as well as substance use disorder (SUD) (also referred to as dependence or abuse), treatment, health topics, and alcohol consumption. For youths, topics include youth experiences and measures on mental health service utilization, major depressive episode (MDE), and treatment for depression (among youths with MDE). For adults, topics include measures on any mental illness (AMI), serious mental illness (SMI), moderate mental illness, low (mild) mental illness, mental health service utilization (i.e., treatment or counseling for mental health issues), suicidal thoughts and behaviors, MDE, treatment for depression (among adults with MDE), and serious psychological distress (SPD). Measures such as risk and availability of substance use, the co-occurrence of mental disorders with substance use or with SUDs also are presented for both adults and youths. Measures of these behaviors and characteristics are presented by a variety of demographic, geographic, and other variables. The estimates in the tables include rates of the behaviors, numbers of persons engaging in these behaviors, and other measures.

A summary report, 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions, accompanies these detailed tables and contains information on key definitions (i.e., the glossary in Section D) for many of the measures and terms used in these detailed tables and in other 2015 NSDUH documents, along with further analytic details on these measures (see Section B) and the survey.¹ Where relevant, the glossary provides cross-references between terms and specific question wording for clarity.

In addition to these detailed tables, two first findings reports (FFRs) that are focused on key substance use and mental health indicators and prescription drug use and misuse data from the 2015 NSDUH are scheduled to be made available online in September 2016 at https://www.samhsa.gov/data/. Other FFRs on topics such as suicide thoughts and behavior among adults, receipt of services for substance use and mental health issues among adults, sexual orientation and adult substance use and mental health, risk and protective factors and initiation of substance use, and a substance use and mental health profile of spouses and children of U.S. military personnel will be available online by the end of 2016.

SURVEY DESIGN

A coordinated sample design was developed for the 2014 through 2017 NSDUHs. It is a state-based design with an independent, multistage area probability sample within each state and the District of Columbia. As a result, states are viewed as the first level of stratification. Each state is further stratified into approximately equally populated state sampling regions (SSRs). Creation of each year's multistage area probability sample then involves selecting census tracts within each SSR, census block groups within census tracts, and area segments (i.e., a collection of census blocks) within census block groups. Finally, dwelling units (DUs) are selected within segments, and within each selected DU, up to two residents who are at least 12 years old are selected for the interview.

The coordinated design for 2014 through 2017 includes a 50 percent overlap in third-stage units (area segments) within each successive 2-year period from 2014 through 2017. The designed overlap slightly increases the precision of estimates of year-to-year trends because of the expected small but positive correlation resulting from the overlapping area segments between successive survey years. The design also allocates more interviews to the largest 12 states (compared with the 1999 to 2013 design). Making the sample sizes more proportional to the state population sizes improves the precision of NSDUH estimates.

Starting in 2014, the allocation of the sample by age group changed. In the 2005 through 2013 NSDUHs, the sample was allocated equally between three age groups: 12 to 17, 18 to 25, and 26 or older. Starting in 2014, the allocation of the NSDUH sample became 25 percent for adolescents aged 12 to 17, 25 percent for adults aged 18 to 25, and 50 percent for adults aged 26 or older. The sample of adults aged 26 or older was further divided into three subgroups: aged 26 to 34 (15 percent), aged 35 to 49 (20 percent), and aged 50 or older (15 percent). These age allocation changes were designed to reflect more closely the actual population distributions by state and age group, so that the precision of estimates overall and for older age groups could be improved.

BREAKS IN TRENDS DUE TO QUESTIONNAIRE AND OTHER CHANGES

NSDUH has undergone changes over the years in order to improve the quality of its data and to address the changing needs of policymakers and researchers with regard to substance use and mental health issues. These changes affect the level of comparability across years and many times cause breaks in trends. Information pertaining to some of the more major changes over the years are summarized below. For more detailed information on these revisions, see Sections B and C of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.²

2015 NSDUH Redesign Changes and Impact

The NSDUH questionnaire underwent a partial redesign in 2015. The prescription drug questions for pain relievers, tranquilizers, stimulants, and sedatives were redesigned to shift the focus from lifetime misuse to past year misuse. Additionally, questions were added about any past year prescription drug use, rather than just misuse. A separate section with methamphetamine questions was added, replacing the methamphetamine questions that were previously asked within the context of prescription stimulants. Substantial changes were also made to questions about smokeless tobacco, binge alcohol use, inhalants, and hallucinogens.

These changes led to potential breaks in the comparability of 2015 estimates with estimates from prior years. Consequently, these changes potentially affected overall summary measures, such as any illicit drug use, and other measures, such as initiation, SUDs, and substance use treatment. Additionally, certain demographic items were changed as part of the partial redesign. Employment questions were moved from the computer-assisted personal interviewing (CAPI) section to the audio computer-assisted self-interviewing (ACASI) section of the questionnaire. Education questions were updated, and new questions were added on disability, English-language proficiency, sexual orientation of adults, and military families.

Due to the potential breaks in comparability, many estimates from prior years have been noted in the detailed tables as not comparable due to methodological changes. These include measures of overall illicit drug use, use of illicit drugs other than marijuana, use of hallucinogens, inhalants, and methamphetamine, misuse of psychotherapeutics, binge and heavy alcohol use overall and among females, smokeless tobacco, and substance use treatment. Additionally, estimates by education and current employment have been noted as not comparable. Other topics, such as the mental health topics, did not undergo major changes and therefore are considered comparable.

There are new tables for 2015 pertaining to any past year prescription drug use. Within these tables, corresponding estimates from prior years are noted as unavailable. The newly defined any use of prescription drugs includes both use as directed by a doctor as well as misuse. Misuse includes use in any way not directed by a doctor, including use without a prescription of one's own, use in greater amounts, more often or longer than told to take a drug, or use in any way not directed by a doctor. The detailed tables no longer use the term "nonmedical use" and instead use the term "misuse." For more specific information about each of the 2015 NSDUH changes, see Section C of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.³

Because of the change in focus of the 2015 NSDUH questions for specific psychotherapeutic drugs from the lifetime to the past year period among respondents who last misused any prescription psychotherapeutic drug in any of the four categories (pain relievers, tranquilizers, stimulants, or sedatives) more than 12 months ago, there appeared to be an underreporting of lifetime prescription drug misuse compared with prior years. This might be because respondents are no longer presented with examples of drugs that formerly were available by prescription in the United States but are no longer available and because there are many fewer questions asking about lifetime use. These respondents who did not report misuse that occurred more than 12 months ago would be misclassified as still being "at risk" for initiation of misuse of prescription drugs in that psychotherapeutic category (i.e., individuals who initiated misuse more than 12 months ago are no longer at risk for initiation). For this reason, the tables do not show percentages for initiation of misuse of psychotherapeutic drugs among individuals who were at risk for initiation. The tables also do not show estimates for lifetime psychotherapeutic drug use. For more specific information about each of the 2015 changes, see Sections B.4.1 and B.4.2 in Section B of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.⁴

In order to evaluate the changes from the redesign, a 12-month redesign impact assessment was completed. Analyses were conducted on a subset of variables associated with the detailed tables to check for potential trend breaks, including the risk and availability measures. After significant differences between 2015 and previous years were found for 16 of 17 raw risk and availability variables during an initial analysis, logistic regression models were run on dichotomous recodes. All of the perceived great risk of harm associated with substance use measures yielded a significant increase in 2015 compared with previous years. Extreme weights and missingness rates were investigated to ensure these were not the cause of the difference. As more data become available, trends over time will be further analyzed to determine comparability. Currently, estimates for these measures in the detailed tables for years prior to 2015 have been noted as not reported due to measurement issues.

Previous Mental Health Changes and Impact

Because of additional survey improvements and questionnaire changes to the mental health sections between 2002 and 2012, it is not possible to assess long-term trends for all of the mental health issues. A summary of the changes is described below, but for more detailed information on revisions, see Sections B.4.7 in Section B of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.⁵

In 2012 revisions were made to the 2008 to 2011 past year AMI and SMI estimates. Past year mental illness estimates for 2008 through 2011 found in mental health detailed tables and reports published prior to 2012 were based on a prediction model for mental illness developed using the 2008 clinical data from the Mental Health Surveillance Study (MHSS). An improved model was used for estimates starting in 2012. For the 2012, 2013, and 2014 mental health detailed tables and the 2015 detailed tables, the 2012 to 2015 estimates and the previous 2008 to 2011 estimates are based on the 2012 model.

It is recommended that the mental illness variables derived from the 2012 model not be used when analyzing variables for past year suicidal thoughts, past year MDE, the Kessler-6 (K6) mental disorder scale, or the World Health Organization Disability Assessment Schedule (WHODAS) scale, and it is also recommended that the mental illness variables derived from the 2012 model not be used when analyzing other closely linked variables (including past year suicide attempts, past year suicide plans, medical treatment for suicide attempts, lifetime MDE, SPD, or components used in the K6 or WHODAS scales). For detailed information on model revisions to the mental illness items, see Section B.4.7 in Section B of 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.⁶ As with the mental illness estimates based on the 2008 model, the mental illness estimates based on the 2012 model are not comparable with SMI estimates produced from NSDUH data prior to 2004, and SMI estimates were not produced from 2004 to 2007; thus, long term trend estimates are not available for SMI.

Because of the 2008 questionnaire revisions to the mental health module, several estimates in 2008 (MDE and past 12-month SPD) were affected by context effects. However, an adjustment for the questionnaire changes was applied to estimates of MDE for 2005 to 2008. For more detailed information, see Section B.4.8 in Section B of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.⁷ Therefore, long-term trend estimates for these two measures are available from 2005 through 2015. No additional questionnaire changes from 2009 to 2015 have led to changes in these adult measures. Moreover, no questionnaire changes have been implemented that affected the adult mental health service utilization questions; therefore, estimates of mental health service utilization presented in these detailed tables reflect trends from 2002 to 2015. The only exceptions are estimates that combine mental health data with other topics that are considered not comparable.

No questionnaire revisions affected MDE for youths aged 12 to 17; thus, long-term trend estimates are available from 2004 through 2015. However, revisions to the youth mental health service utilization module of the 2009 NSDUH questionnaire resulted in new estimates and a discontinuation of trends for several items on the source of mental health services. New questions regarding the receipt of mental health services from juvenile justice sources were added in 2009, and questions regarding services from educational sources were revised and are not comparable with estimates prior to 2009.

Changes to Previously Published Estimates

During regular data collection and processing checks for the 2011 NSDUH, data errors were identified. These errors affected the data for Pennsylvania (2006 to 2010) and Maryland (2008 and 2009). Cases with erroneous data were removed from the data files, and the remaining cases were reweighted to provide representative estimates. The errors had minimal impact on the national estimates and no effect on direct estimates for the other 48 states and the District of Columbia. In reports where model-based small area estimation (SAE) techniques are used, estimates for all states may be affected, even though the errors were concentrated in only two states. In reports that do not use model-based estimates, the only estimates appreciably affected are estimates for Pennsylvania, Maryland, the mid-Atlantic division, and the Northeast region.

The 2015 detailed tables and 2015 FFRs do not include state-level or model-based estimates. However, the 2015 detailed tables do include estimates for the mid-Atlantic division and the Northeast region. Estimates based on 2006 to 2010 data may differ from previously published estimates. Tables and estimates based only on data since 2011 are unaffected by these data errors. All affected tables (i.e., tables with estimates based on 2006 to 2010 data) contain a note to indicate this to the user.

Caution is advised when comparing data from older reports with data from more recent reports that are based on corrected data files. As discussed above, comparisons of estimates for Pennsylvania, Maryland, the mid-Atlantic division, and the Northeast region are of most concern, while comparisons of national data or data for other states and regions are essentially still valid. The Center for Behavioral Health Statistics and Quality (CBHSQ) within the Substance Abuse and Mental Health Services Administration (SAMHSA) does not recommend making comparisons between unrevised 2006 to 2010 estimates and estimates based on data for 2011 and subsequent years for the areas of greatest concern.

New 2002 Baseline

Methodological differences implemented in the 2002 NSDUH affected the comparability of the 2002 estimates with prior surveys. Some of the changes included the addition of a $30 incentive, a change in the survey name from the National Household Survey on Drug Abuse (NHSDA) to the current name, and updated population data from the 2000 decennial census being incorporated into the sample weights. Because of these improvements in the 2002 NSDUH, the 2002 data constitute a new baseline for tracking trends in substance use and other measures. Therefore, estimates from the 2002 through 2015 surveys should not be compared with estimates from the 2001 or earlier surveys to examine changes over time. In addition to the 2002 baseline change, the aforementioned changes for the 2015 NSDUH also mean that 2015 is a new baseline for many measures.

Methodology changes throughout NSDUH's history make it difficult to assess long-term trends from tables presenting data from 1971 to 2015. However, it is instructive to compare NSDUH estimates from 1971 to 2015 by "piecing together" the data from time periods for which data are comparable. Specifically, valid trend comparisons can be made for 1971 to 1998, 1999 to 2001, and 2002 to 2015. With this approach, comparisons between 1998 and 1999, and between 2001 and 2002, should be made with caution because they are potentially biased due to changes in methods. Nevertheless, when these data are combined in a single presentation, it often becomes clear that the effects of the changes in methods are small compared with the major shifts in substance use prevalence that have occurred over the past five decades.

TABLE PRESENTATION

Although the majority of the detailed tables present estimates from the 2014 and 2015 NSDUHs, some tables include only estimates from the 2015 NSDUH. Additionally, due to the 2015 redesign, a number of tables are formatted to present 2 years of data, but all of the 2014 estimates are noted as not comparable or not reported. The ability to present 2 years of estimates will be available in subsequent years when more data are available. In these cases, any corresponding multiyear trend tables (i.e., using more than 2 years of data) have been dropped. As more comparable years of data are available, multiyear trend tables for these measures will be added. Also included are a number of tables that present data from earlier surveys in the series, including a section of tables presenting data mainly from 2002 to 2015 or 2008 to 2015, with a few tables with data with various years starting from 2004 to 2009, and a couple of tables presenting data from 1971 to 2015. Below is information on how the tables are organized, the types of tables that are available, information about specific indicators used for the 2015 detailed tables, information on missingness, information on the impact of rounding on estimates presented in the tables, and how totals are to be interpreted within the tables.

Table Numbering

The detailed tables are numbered using a three-part numbering scheme (e.g., 1.15A). The first part of the table number (1.15A) is the subject matter section to which a particular table belongs. The second part (1.15A) is the number of the table within a particular section. The third part (1.15A) is a table type indicator, an alphabetic letter appended to the table number. Each table number, as explained below, has multiple table types. Tables are numbered sequentially within each subject matter section. Identical tables across years may not be assigned the same table number each year. Due to the large number of changes for the 2015 NSDUH, particularly the combination of the detailed tables and mental health detailed tables, more tables than usual may have different table numbers from the prior year.

As noted above, in 2014 there were two sets of detailed tables—the detailed tables and the mental health detailed tables. The 2014 detailed tables included eight sections, and the 2014 mental health detailed tables contained three sections. A crosswalk has been included below that shows the detailed tables by section in the 2014 detailed tables and the new sections within the 2015 detailed tables.

2014 Table Section	2015 Table Section
Detailed Tables
Sections 1 to 7	Sections 1 to 7
Section 8 (Sample Size and Population Tables)	Section 12
Mental Health Detailed Tables
Section 1 (Adult Mental Health 2-Year Tables)	Section 8
Section 1 (Adult Mental Health Multiyear Trend Tables)	Section 10
Section 2 (Youth Mental Health 2-Year Tables)	Section 9
Section 2 (Youth Mental Health Multiyear Trend Tables)	Section 11
Section 3 (Sample Size and Population Tables)	Section 12

The 12 subject matter sections and the number of tables per section are as follows:

Section 1: Illicit Drug Use Tables – 1.1 to 1.158

Section 2: Tobacco Product and Alcohol Use Tables – 2.1 to 2.88

Section 3: Risk and Protective Factor Tables – 3.1 to 3.38

Section 4: Incidence Tables – 4.1 to 4.20

Section 5: Substance Use Disorder and Treatment Tables – 5.1 to 5.62

Section 6: Miscellaneous Tables – 6.1 to 6.107

Section 7: Trend Tables – 7.1 to 7.51

Section 8: Adult Mental Health Tables – 8.1 to 8.87

Section 9: Youth Mental Health Tables – 9.1 to 9.17

Section 10: Adult Mental Health Trend Tables – 10.1 to 10.41

Section 11: Youth Mental Health Trend Tables – 11.1 to 11.6

Section 12: Sample Size and Population Tables – 12.1 to 12.11

Table Types and Purpose

The table type indicators are primarily defined as follows; however, some exceptions do exist and are noted in subsequent text.

Table Type	Purpose of the Table
A:	Presents estimates of the numbers of persons exhibiting the specified behavior or characteristic (e.g., substance use) in the populations described by the column and row headings.
B:	Presents estimates of the percentages of persons exhibiting the specified behavior or characteristic (e.g., substance use) in the populations described by the column and row headings.
C:	Presents the standard error associated with each of the estimates in the "A" tables.
D:	Presents the standard error associated with each of the estimates in the "B" tables.
N:	Presents the number of cases in the specified NSDUH sample with the characteristics defined by the column and row headings.
P:	Presents the p values from tests of the statistical significance of differences between columns in the "B" tables.

The majority of tables within the detailed tables contain five table types (A, B, C, D, and P) as defined above. Note that table type N is used exclusively within Section 12 to display the sample size counts. Also, table type P is excluded for sets of tables where no significance testing is performed between 2015 and previous years. This includes tables that show only a single year of data and tables where all of the pre-2015 NSDUH estimates are deemed not comparable (i.e., estimates replaced with "nc" as defined below) or are not reported (i.e., estimates replaced with "nr" as defined below) within a table. Exceptions to this organization are noted as follows:

Section 3 (Risk and Protective Factor Tables) includes tables for which only table types A, B, C, and D are produced (Tables 3.22 to 3.38). These tables present estimates for the 2015 NSDUH only; thus, these are not trend tables, so significance tests between years are not relevant and table type P is not applicable.
Section 4 (Incidence Tables) contains both tables for which only table types A and C are produced and tables for which only table types B, D, and P are produced. Specifically, one subset of tables (Tables 4.13 to 4.16) includes table types A and C. This subset of tables presents the number of past year initiates in table type A and the associated standard errors in table type C. The remaining Section 4 tables include only table types B, D, and P. Tables 4.1 to 4.12 present numbers and percentages of past year initiates in table type B, associated standard errors for each of these estimates in table type D, and p values from tests of statistical differences between years in table type P. Tables 4.17 to 4.20 present the mean age for past year initiates in table type B, associated standard errors in table type D, and p values from tests of statistical differences between years in table type P.
Section 5 (Substance Use Disorder and Treatment Tables) includes tables for which only table types A, B, C, and D are produced (Tables 5.61 and 5.62). These tables present estimates for the 2015 NSDUH only; thus, these are not trend tables, so significance tests between years are not relevant and table type P is not applicable.
Section 7 (Trend Tables) contains one subset of tables for which only table types B and D are produced and one subset of tables for which only table types B, D, and P are produced. Specifically, one subset of tables (Tables 7.50 and 7.51) are multiyear tables that present estimated percentages for 1971 to 2015 in table type B and associated standard errors in table type D. The estimated total number of users and associated standard errors are not presented, nor are between-year significance tests implemented; thus, table types A, C, and P are not used. The other subset of tables (Table 7.39) includes multiyear tables that involve only table types B, D, and P. Table 7.39 presents the mean age at first substance use for past year initiates in table type B, associated standard errors for each of these estimates in table type D, and p values from tests of statistical differences between years in table type P.
Section 12 (Sample Size and Population Tables) contains only table types A, C, and N. Population counts, standard errors, and sample sizes are displayed in table types A, C, and N, respectively. Percentages of the population and associated standard error tables are not provided in this section.

Table Indicators

Each 2015 detailed table, including those for all of the above table types, contains the following definitional footnote, regardless of whether any or all of the indicators were used in the table:

* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues.

The "* = low precision" portion of the footnote indicates an estimate is being suppressed (i.e., not shown) due to low precision.

The "-- = not available" portion of the footnote indicates that for the given year, the questions used to produce the estimates were not available. For example, prior to 2015, respondents were not asked about methamphetamine use disorder. Thus, for 2014 and earlier years, those estimates are shown with the "--" notation.

The "da = does not apply" portion of the footnote indicates that the question or estimate does not apply to a certain group. For example, in pregnancy tables, the trimester estimates are shown as "da" for overall females and nonpregnant females, and in the incidence tables that show numbers in thousands and percentages in the same table, the p values for the numbers in thousands are replaced with "da" because the detailed tables only show p values of tests of differences of percentages.

The "nc = not comparable due to methodological changes" portion of the footnote indicates that estimates for the measure do exist for prior years, but they are no longer comparable with the current year estimate. For example, illicit drug use estimates are available for all years in the detailed tables, but the 2015 estimates are not comparable with the 2002 through 2014 estimates due to questionnaire changes. Thus, the 2014 and prior year estimates are shown with the "nc" notation.

The "nr = not reported due to measurement issues" portion of the footnote indicates that the estimate could be calculated based on available data but is not calculated due to potential measurement issues. For example, lifetime use of pain relievers for 2015 is shown as "nr" because the questionnaire was changed to focus on past year misuse of pain relievers rather than lifetime past year use of pain relievers, and there appears to be an underestimate of lifetime pain reliever use compared with prior years.

For more information on how low precision is defined and further details on the changes noted above, see Section B.2.2 in Section B and Section C of the 2015 National Survey on Drug Use and Health: Methodological Summary and Definitions.⁸

Additionally, all type A and C detailed tables where significance testing was performed between years contain the following footnotes, regardless of whether any differences were significant:

^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical.

^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical.

Tables where significance testing was not performed between years, such as those with only a single year or single group of combined years or those with no comparable estimates for years prior to 2015, do not contain these footnotes.

Missingness

Some measures are not defined for all respondents and have missing data. In the detailed tables, a footnote or note is included to alert a user to the fact that missing data were excluded from the analysis. For the 2015 NSDUH, an investigation was completed to look at missing data rates in the 2015 detailed tables. The investigation was done for all new 2015 measures and existing measures where there was a break in trend. For other measures, the results from the 2014 investigations were assumed to still hold. That is, missing data were not a concern for most topics. Similar results were found in 2015. However, a few items did have a slightly higher rate of missing data (e.g., items on perceived availability of various illicit drugs and items on source of prescription drugs obtained for most recent use). The exclusion of respondents with missing data induces a negative bias for estimates of population totals and may induce a bias in either direction for estimates of population means and proportions. For more information, see Chapter 4 of the 2014 NSDUH statistical inference report.⁹

Rounding and Effect on Significance Testing

Prevalence estimates in the form of percentages are presented rounded to the nearest tenth of a percent, and total estimates are rounded to the nearest thousand. Due to this rounding, prevalence estimates of 0.0 percent and total estimates of 0 are displayed in the tables. These estimates are rounded down from a percentage < 0.05 percent or < 50, respectively, and do not represent an absence of persons displaying a particular characteristic. Nonrounded estimates of zero are suppressed.

Testing between two prevalence estimates can indicate significant differences involving estimates that appear identical when rounded but are actually different. Note that similar results can be seen in the average age-at-first-use estimates, which are also rounded to the nearest tenth, and the total estimates. For example, in Table 1.2B, the estimate for lifetime crack use among youths aged 12 to 17 was 0.1 percent for both 2014 and 2015 and was indicated as significantly different. Although the rounded estimates appear the same, the unrounded estimates were 0.139 percent for 2014 and 0.050 percent for 2015. Another example in trend Table 7.3B of the 2015 detailed tables shows how seemingly identical estimates from previous years can differ in significance when each is compared against the current year estimate. The estimate for past month cocaine use among people aged 12 or older was 0.6 percent for 2010, 2012, 2013, and 2014, but only the 2014 estimate was significantly different from the 2015 estimate of 0.7 percent. Although the rounded estimates for 2010, 2012, 2013, and 2014 appeared to be the same, the unrounded estimates were 0.580 percent for 2010, 0.634 percent for 2012, 0.590 percent for 2013, and 0.577 percent for 2014 and had varying standard errors that affected the testing. Note that differences in precision can also cause seemingly identical (or identical) previous year estimates to differ in significance when compared with the current year estimate.

Definitions of Totals

Totals are defined in different ways within the detailed tables. Totals can refer to the estimated number of persons with a specific characteristic, as shown in detailed table types A and displayed in number of thousands. For example, in Table 2.2, the total estimated population of persons aged 12 to 17 who used cigarettes in the past year in 2015 was approximately 2,021,000 and shown as 2,021. Totals can also be presented in the table rows or columns, either as a total of a subgroup category or listed as the "Total Population." If the estimate is a total of a subgroup category (e.g., total of gender), the estimate is the total number of both males and females combined. Instances where measures have missing data may cause the subcategories to not add up to total and are noted in the tables. If the estimate is shown as the "Total Population" on the row, then that estimate is usually included as a reference for tables with a nonstandard denominator. This total population estimate is normally the number being used in the nonstandard denominator to allow users to easily see that estimate without having to switch tables. For example, in Table 8.23, the total population row for table type A shows the estimated number of persons who fit the criteria in the columns, which are the table denominators (i.e., 9,765,000 adults reported SMI in the past year for 2015), and this number is used as the denominator in all the dependence estimates.

LOCATING A TABLE

The detailed tables are organized by table type into two categories:

Prevalence Estimates and Sample Sizes – Table Types A, B, and N
Standard Errors and P Values – Table Types C, D, and P

Both categories are organized based on 12 subject matter sections as listed below. Clicking on the subject matter section of interest takes users to a list of tables for that section. Users can scroll through the list of table titles to find the table of interest, then click on the table title to go directly to that table. Users need to return to the table of contents to access tables from other sections or categories.

As mentioned earlier, the key definitions for the 2015 NSDUH (i.e., the glossary) appear in Section D of the 2015 methodological summary and definitions report and define and cross-reference many key measures used in the 2015 detailed tables and the 2015 FRRs.¹⁰ The glossary may be helpful when used in conjunction with the list of tables in identifying tables that contain information for selected measures. However, not all measures and terms listed in the glossary are specifically mentioned in the list of tables.

Note that the table numbers and section differ from previous years. The 2015 mental health detailed tables contained three sections. Section 1 of the 2014 mental health detailed tables is now equivalent to Sections 8 and 10 of the 2015 detailed tables; 2014's Section 2 is equivalent to Sections 9 and 11 of the 2015 detailed tables; and 2014's Section 3 (the sample size and population tables) is now included in Section 12 of the 2015 detailed tables.

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	130,610	nc	47,730	nc	27,080
Marijuana	117,213	117,865	35,124	36,043	22,188	22,226
Cocaine	39,200	38,744	4,553	4,828	1,530^a	1,876
Crack	9,424	9,035	773	833	354	394
Heroin	4,813	5,099	914	828	435	329
Hallucinogens	nc	40,915	nc	4,692	nc	1,240
LSD	25,035	25,324	1,290^a	1,535	287	352
PCP	6,388	6,323	90	120	*	25
Ecstasy	nc	18,328	nc	2,560	nc	557
Inhalants	nc	25,765	nc	1,759	nc	527
Methamphetamine	nc	14,511	nc	1,713	nc	897
Misuse of Psychotherapeutics³	nc	nr	nc	18,942	nc	6,365
Pain Relievers	nc	nr	nc	12,462	nc	3,775
Tranquilizers	nc	nr	nc	6,050	nc	1,874
Stimulants	nc	nr	nc	5,251	nc	1,653
Sedatives	nc	nr	nc	1,511	nc	446
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	77,032	nc	24,539	nc	9,273

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	48.8	nc	17.8	nc	10.1
Marijuana	44.2	44.0	13.2	13.5	8.4	8.3
Cocaine	14.8	14.5	1.7	1.8	0.6^a	0.7
Crack	3.6	3.4	0.3	0.3	0.1	0.1
Heroin	1.8	1.9	0.3	0.3	0.2	0.1
Hallucinogens	nc	15.3	nc	1.8	nc	0.5
LSD	9.4	9.5	0.5^a	0.6	0.1	0.1
PCP	2.4	2.4	0.0	0.0	*	0.0
Ecstasy	nc	6.8	nc	1.0	nc	0.2
Inhalants	nc	9.6	nc	0.7	nc	0.2
Methamphetamine	nc	5.4	nc	0.6	nc	0.3
Misuse of Psychotherapeutics³	nc	nr	nc	7.1	nc	2.4
Pain Relievers	nc	nr	nc	4.7	nc	1.4
Tranquilizers	nc	nr	nc	2.3	nc	0.7
Stimulants	nc	nr	nc	2.0	nc	0.6
Sedatives	nc	nr	nc	0.6	nc	0.2
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	28.8	nc	9.2	nc	3.5

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	6,297	nc	4,346	nc	2,193
Marijuana	4,091	3,912	3,262	3,137	1,830	1,752
Cocaine	222	208	168	153	39	53
Crack	35^a	12	20^a	5	8	1
Heroin	36	35	28	21	16	5
Hallucinogens	nc	760	nc	523	nc	121
LSD	291	329	214	251	65	53
PCP	60	60	33	34	3	9
Ecstasy	nc	357	nc	201	nc	33
Inhalants	nc	2,271	nc	684	nc	175
Methamphetamine	nc	71	nc	40	nc	13
Misuse of Psychotherapeutics³	nc	nr	nc	1,464	nc	492
Pain Relievers	nc	nr	nc	969	nc	276
Tranquilizers	nc	nr	nc	394	nc	162
Stimulants	nc	nr	nc	491	nc	117
Sedatives	nc	nr	nc	102	nc	21
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	3,963	nc	2,263	nc	750

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	25.3	nc	17.5	nc	8.8
Marijuana	16.4	15.7	13.1	12.6	7.4	7.0
Cocaine	0.9	0.8	0.7	0.6	0.2	0.2
Crack	0.1^a	0.1	0.1^a	0.0	0.0	0.0
Heroin	0.1	0.1	0.1	0.1	0.1	0.0
Hallucinogens	nc	3.1	nc	2.1	nc	0.5
LSD	1.2	1.3	0.9	1.0	0.3	0.2
PCP	0.2	0.2	0.1	0.1	0.0	0.0
Ecstasy	nc	1.4	nc	0.8	nc	0.1
Inhalants	nc	9.1	nc	2.7	nc	0.7
Methamphetamine	nc	0.3	nc	0.2	nc	0.1
Misuse of Psychotherapeutics³	nc	nr	nc	5.9	nc	2.0
Pain Relievers	nc	nr	nc	3.9	nc	1.1
Tranquilizers	nc	nr	nc	1.6	nc	0.7
Stimulants	nc	nr	nc	2.0	nc	0.5
Sedatives	nc	nr	nc	0.4	nc	0.1
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	15.9	nc	9.1	nc	3.0

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	12.2	nc	6.8	nc	2.6
Marijuana	2.7	2.5	2.4	1.7	1.1	0.8
Cocaine	0.1	0.1	0.0	0.1	*	0.1
Crack	0.0	*	*	*	*	*
Heroin	0.0	0.0	0.0	*	*	*
Hallucinogens	nc	1.1	nc	0.9	nc	0.3
LSD	0.1^a	0.5	0.0^a	0.4	*	0.1
PCP	0.1	0.2	0.0	0.2	*	0.1
Ecstasy	nc	0.2	nc	0.1	nc	0.0
Inhalants	nc	7.9	nc	3.4	nc	1.0
Methamphetamine	nc	0.0	nc	0.0	nc	*
Misuse of Psychotherapeutics³	nc	nr	nc	2.2	nc	0.9
Pain Relievers	nc	nr	nc	1.9	nc	0.8
Tranquilizers	nc	nr	nc	0.2	nc	0.1
Stimulants	nc	nr	nc	0.1	nc	0.0
Sedatives	nc	nr	nc	0.1	nc	0.0
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	10.7	nc	5.7	nc	2.0

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	2,036	nc	1,336	nc	622
Marijuana	1,168	1,128	955	926	468	492
Cocaine	41	29	30	23	11	6
Crack	9	2	5	*	1	*
Heroin	2	6	2	6	2	2
Hallucinogens	nc	176	nc	129	nc	29
LSD	75	67	60	46	13	9
PCP	28	18	18	8	*	*
Ecstasy	nc	79	nc	57	nc	13
Inhalants	nc	849	nc	250	nc	54
Methamphetamine	nc	12	nc	8	nc	1
Misuse of Psychotherapeutics³	nc	nr	nc	425	nc	143
Pain Relievers	nc	nr	nc	304	nc	85
Tranquilizers	nc	nr	nc	98	nc	33
Stimulants	nc	nr	nc	115	nc	37
Sedatives	nc	nr	nc	29	nc	11
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	1,337	nc	707	nc	212

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	23.6	nc	15.5	nc	7.2
Marijuana	13.8	13.1	11.3	10.7	5.5	5.7
Cocaine	0.5	0.3	0.4	0.3	0.1	0.1
Crack	0.1	0.0	0.1	*	0.0	*
Heroin	0.0	0.1	0.0	0.1	0.0	0.0
Hallucinogens	nc	2.0	nc	1.5	nc	0.3
LSD	0.9	0.8	0.7	0.5	0.2	0.1
PCP	0.3	0.2	0.2	0.1	*	*
Ecstasy	nc	0.9	nc	0.7	nc	0.1
Inhalants	nc	9.8	nc	2.9	nc	0.6
Methamphetamine	nc	0.1	nc	0.1	nc	0.0
Misuse of Psychotherapeutics³	nc	nr	nc	4.9	nc	1.7
Pain Relievers	nc	nr	nc	3.5	nc	1.0
Tranquilizers	nc	nr	nc	1.1	nc	0.4
Stimulants	nc	nr	nc	1.3	nc	0.4
Sedatives	nc	nr	nc	0.3	nc	0.1
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	15.5	nc	8.2	nc	2.5

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	3,303	nc	2,474	nc	1,364
Marijuana	2,708	2,589	2,120	2,077	1,273	1,194
Cocaine	171	171	136	123	29	43
Crack	24	11	15	5	7	1
Heroin	32	29	25	15	14	3
Hallucinogens	nc	495	nc	325	nc	72
LSD	208	225	152	174	52	35
PCP	27	24	14	13	3	4
Ecstasy	nc	265	nc	137	nc	20
Inhalants	nc	800	nc	169	nc	41
Methamphetamine	nc	57	nc	30	nc	12
Misuse of Psychotherapeutics³	nc	nr	nc	865	nc	279
Pain Relievers	nc	nr	nc	516	nc	127
Tranquilizers	nc	nr	nc	278	nc	120
Stimulants	nc	nr	nc	364	nc	77
Sedatives	nc	nr	nc	65	nc	10
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	1,784	nc	1,105	nc	380

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	39.4	nc	29.5	nc	16.3
Marijuana	31.8	30.9	24.9	24.8	15.0	14.2
Cocaine	2.0	2.0	1.6	1.5	0.3	0.5
Crack	0.3	0.1	0.2	0.1	0.1	0.0
Heroin	0.4	0.3	0.3	0.2	0.2	0.0
Hallucinogens	nc	5.9	nc	3.9	nc	0.9
LSD	2.4	2.7	1.8	2.1	0.6	0.4
PCP	0.3	0.3	0.2	0.2	0.0	0.0
Ecstasy	nc	3.2	nc	1.6	nc	0.2
Inhalants	nc	9.5	nc	2.0	nc	0.5
Methamphetamine	nc	0.7	nc	0.4	nc	0.1
Misuse of Psychotherapeutics³	nc	nr	nc	10.3	nc	3.3
Pain Relievers	nc	nr	nc	6.2	nc	1.5
Tranquilizers	nc	nr	nc	3.3	nc	1.4
Stimulants	nc	nr	nc	4.3	nc	0.9
Sedatives	nc	nr	nc	0.8	nc	0.1
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	21.3	nc	13.2	nc	4.5

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	124,313	nc	43,384	nc	24,887
Marijuana	113,121	113,952	31,862	32,906	20,357	20,474
Cocaine	38,978	38,535	4,385	4,675	1,491^a	1,822
Crack	9,389	9,022	754	828	347	393
Heroin	4,777	5,064	885	807	419	325
Hallucinogens	nc	40,155	nc	4,169	nc	1,118
LSD	24,744	24,994	1,075^a	1,284	222	299
PCP	6,328	6,262	57	86	*	17
Ecstasy	nc	17,971	nc	2,359	nc	524
Inhalants	nc	23,494	nc	1,076	nc	352
Methamphetamine	nc	14,440	nc	1,673	nc	885
Misuse of Psychotherapeutics³	nc	nr	nc	17,478	nc	5,873
Pain Relievers	nc	nr	nc	11,492	nc	3,499
Tranquilizers	nc	nr	nc	5,656	nc	1,712
Stimulants	nc	nr	nc	4,760	nc	1,536
Sedatives	nc	nr	nc	1,409	nc	425
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	73,068	nc	22,276	nc	8,523

Table 1.16A – Marijuana Use in Lifetime, Past Year, and Past Month, by Detailed Age Category: Numbers in Thousands, 2014 and 2015
Age Category	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
TOTAL	117,213	117,865	35,124	36,043	22,188	22,226
12-17	4,091	3,912	3,262	3,137	1,830	1,752
12	51	56	46	32	20	11
13	165	140	140	102	69	56
14	390	375	328	302	156	153
15	778	752	628	624	312	339
16	1,201	1,166	957	943	572	503
17	1,507	1,423	1,163	1,134	702	690
18 or Older	113,121	113,952	31,862	32,906	20,357	20,474
18-25	18,390	18,392	11,154	11,246	6,836	6,921
18	1,801	1,801	1,432	1,381	872	764
19	2,009	2,044	1,524	1,501	895	924
20	2,257	2,185	1,540	1,496	969	973
21	2,387	2,222	1,547	1,432	891	862
22	2,578	2,364	1,494	1,399	917	896
23	2,461	2,561	1,290	1,398	876	907
24	2,476	2,626	1,161^a	1,392	691	814
25	2,419	2,590	1,168	1,247	726	780
26 or Older	94,732	95,561	20,707	21,660	13,521	13,552
26-29	9,430	9,777	3,990	4,059	2,444	2,574
30-34	11,684	11,410	3,766	3,843	2,378	2,359
35-39	9,808	9,674	2,512	2,705	1,711	1,645
40-44	9,534	9,269	2,049	1,994	1,468	1,284
45-49	10,783	10,623	2,073	2,087	1,352	1,279
50-54	13,331	13,132	2,008	2,408	1,251	1,433
55-59	11,510	12,056	2,272	2,058	1,578	1,426
60-64	8,818	9,424	1,166	1,371	763	917
65 or Older	9,835	10,196	871	1,135	575	636

Table 1.16B – Marijuana Use in Lifetime, Past Year, and Past Month, by Detailed Age Category: Percentages, 2014 and 2015
Age Category	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
TOTAL	44.2	44.0	13.2	13.5	8.4	8.3
12-17	16.4	15.7	13.1	12.6	7.4	7.0
12	1.3	1.4	1.2	0.8	0.5	0.3
13	4.0	3.5	3.4	2.6	1.7	1.4
14	9.3	8.7	7.9	7.0	3.7	3.5
15	18.1	17.4	14.6	14.4	7.3	7.9
16	27.7	27.6	22.1	22.3	13.2	11.9
17	36.1	34.2	27.9	27.2	16.8	16.6
18 or Older	47.1	46.9	13.3	13.6	8.5	8.4
18-25	52.6	52.7	31.9	32.2	19.6	19.8
18	39.1	39.5	31.1	30.3	18.9	16.8
19	48.5	48.0	36.8	35.2	21.6	21.7
20	51.7	52.3	35.3	35.8	22.2	23.3
21	54.9	53.8	35.6	34.7	20.5	20.9
22	57.1	55.5	33.1	32.9	20.3	21.0
23	56.0	57.1	29.3	31.2	19.9	20.2
24	57.3	58.5	26.8^a	31.0	16.0	18.1
25	56.9	56.9	27.5	27.4	17.1	17.1
26 or Older	46.1	46.0	10.1	10.4	6.6	6.5
26-29	55.4	57.0	23.4	23.7	14.4	15.0
30-34	56.0	53.9	18.1	18.1	11.4	11.1
35-39	50.1	49.7	12.8	13.9	8.7	8.4
40-44	47.3	46.2	10.2	9.9	7.3	6.4
45-49	52.5	51.1	10.1	10.0	6.6	6.2
50-54	56.1	57.0	8.5	10.5	5.3	6.2
55-59	55.2	57.2	10.9	9.8	7.6	6.8
60-64	50.3	50.6	6.6	7.4	4.4	4.9
65 or Older	21.9	21.9	1.9	2.4	1.3	1.4

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	51.2	nc	17.9	nc	10.2
Marijuana	47.1	46.9	13.3	13.6	8.5	8.4
Cocaine	16.2	15.9	1.8	1.9	0.6	0.8
Crack	3.9	3.7	0.3	0.3	0.1	0.2
Heroin	2.0	2.1	0.4	0.3	0.2	0.1
Hallucinogens	nc	16.5	nc	1.7	nc	0.5
LSD	10.3	10.3	0.4	0.5	0.1	0.1
PCP	2.6	2.6	0.0	0.0	*	0.0
Ecstasy	nc	7.4	nc	1.0	nc	0.2
Inhalants	nc	9.7	nc	0.4	nc	0.1
Methamphetamine	nc	5.9	nc	0.7	nc	0.4
Misuse of Psychotherapeutics³	nc	nr	nc	7.2	nc	2.4
Pain Relievers	nc	nr	nc	4.7	nc	1.4
Tranquilizers	nc	nr	nc	2.3	nc	0.7
Stimulants	nc	nr	nc	2.0	nc	0.6
Sedatives	nc	nr	nc	0.6	nc	0.2
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	30.1	nc	9.2	nc	3.5

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	20,083	nc	13,102	nc	7,797
Marijuana	18,390	18,392	11,154	11,246	6,836	6,921
Cocaine	3,881	4,074	1,604^a	1,876	473	580
Crack	546	531	127	109	29	39
Heroin	683	616	268	217	82	88
Hallucinogens	nc	6,486	nc	2,453	nc	636
LSD	2,451	2,691	800^a	979	118^b	219
PCP	305	267	36	32	5	2
Ecstasy	nc	4,561	nc	1,422	nc	307
Inhalants	nc	3,463	nc	487	nc	126
Methamphetamine	nc	1,135	nc	329	nc	128
Misuse of Psychotherapeutics³	nc	nr	nc	5,330	nc	1,766
Pain Relievers	nc	nr	nc	2,979	nc	829
Tranquilizers	nc	nr	nc	1,874	nc	582
Stimulants	nc	nr	nc	2,537	nc	757
Sedatives	nc	nr	nc	265	nc	86
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	11,589	nc	7,036	nc	2,645

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	57.5	nc	37.5	nc	22.3
Marijuana	52.6	52.7	31.9	32.2	19.6	19.8
Cocaine	11.1	11.7	4.6^a	5.4	1.4	1.7
Crack	1.6	1.5	0.4	0.3	0.1	0.1
Heroin	2.0	1.8	0.8	0.6	0.2	0.3
Hallucinogens	nc	18.6	nc	7.0	nc	1.8
LSD	7.0	7.7	2.3^a	2.8	0.3^b	0.6
PCP	0.9	0.8	0.1	0.1	0.0	0.0
Ecstasy	nc	13.1	nc	4.1	nc	0.9
Inhalants	nc	9.9	nc	1.4	nc	0.4
Methamphetamine	nc	3.3	nc	0.9	nc	0.4
Misuse of Psychotherapeutics³	nc	nr	nc	15.3	nc	5.1
Pain Relievers	nc	nr	nc	8.5	nc	2.4
Tranquilizers	nc	nr	nc	5.4	nc	1.7
Stimulants	nc	nr	nc	7.3	nc	2.2
Sedatives	nc	nr	nc	0.8	nc	0.2
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	33.2	nc	20.2	nc	7.6

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	6,717	nc	4,916	nc	2,921
Marijuana	6,067	6,029	4,495	4,378	2,735	2,661
Cocaine	752	887	419^a	563	148	166
Crack	83	93	40	29	4	9
Heroin	124	128	67	50	20	14
Hallucinogens	nc	1,781	nc	1,015	nc	256
LSD	677^a	834	319^a	420	37^b	109
PCP	87	70	20	15	2	1
Ecstasy	nc	1,120	nc	541	nc	106
Inhalants	nc	1,123	nc	218	nc	59
Methamphetamine	nc	255	nc	104	nc	41
Misuse of Psychotherapeutics³	nc	nr	nc	1,825	nc	606
Pain Relievers	nc	nr	nc	954	nc	235
Tranquilizers	nc	nr	nc	679	nc	216
Stimulants	nc	nr	nc	894	nc	302
Sedatives	nc	nr	nc	111	nc	24
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	3,623	nc	2,460	nc	901

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	13,366	nc	8,186	nc	4,877
Marijuana	12,322	12,363	6,659	6,868	4,101	4,260
Cocaine	3,128	3,186	1,185	1,313	325	414
Crack	463	438	87	81	25	30
Heroin	559	488	200	167	62	74
Hallucinogens	nc	4,705	nc	1,438	nc	380
LSD	1,774	1,857	481	560	82	111
PCP	218	197	16	17	3	*
Ecstasy	nc	3,440	nc	882	nc	201
Inhalants	nc	2,340	nc	269	nc	66
Methamphetamine	nc	879	nc	226	nc	87
Misuse of Psychotherapeutics³	nc	nr	nc	3,505	nc	1,160
Pain Relievers	nc	nr	nc	2,026	nc	594
Tranquilizers	nc	nr	nc	1,195	nc	366
Stimulants	nc	nr	nc	1,643	nc	455
Sedatives	nc	nr	nc	155	nc	61
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	7,966	nc	4,576	nc	1,744

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	61.0	nc	37.4	nc	22.3
Marijuana	56.5	56.4	30.5	31.3	18.8	19.4
Cocaine	14.3	14.5	5.4	6.0	1.5	1.9
Crack	2.1	2.0	0.4	0.4	0.1	0.1
Heroin	2.6	2.2	0.9	0.8	0.3	0.3
Hallucinogens	nc	21.5	nc	6.6	nc	1.7
LSD	8.1	8.5	2.2	2.6	0.4	0.5
PCP	1.0	0.9	0.1	0.1	0.0	*
Ecstasy	nc	15.7	nc	4.0	nc	0.9
Inhalants	nc	10.7	nc	1.2	nc	0.3
Methamphetamine	nc	4.0	nc	1.0	nc	0.4
Misuse of Psychotherapeutics³	nc	nr	nc	16.0	nc	5.3
Pain Relievers	nc	nr	nc	9.2	nc	2.7
Tranquilizers	nc	nr	nc	5.5	nc	1.7
Stimulants	nc	nr	nc	7.5	nc	2.1
Sedatives	nc	nr	nc	0.7	nc	0.3
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	36.4	nc	20.9	nc	8.0

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	104,230	nc	30,281	nc	17,090
Marijuana	94,732	95,561	20,707	21,660	13,521	13,552
Cocaine	35,097	34,462	2,782	2,799	1,018	1,243
Crack	8,843	8,491	627	718	317	354
Heroin	4,095	4,448	618	591	337	236
Hallucinogens	nc	33,669	nc	1,716	nc	482
LSD	22,293	22,304	275	305	104	80
PCP	6,023	5,995	21	54	*	15
Ecstasy	nc	13,411	nc	937	nc	217
Inhalants	nc	20,031	nc	588	nc	226
Methamphetamine	nc	13,305	nc	1,344	nc	757
Misuse of Psychotherapeutics³	nc	nr	nc	12,148	nc	4,107
Pain Relievers	nc	nr	nc	8,513	nc	2,670
Tranquilizers	nc	nr	nc	3,782	nc	1,130
Stimulants	nc	nr	nc	2,223	nc	779
Sedatives	nc	nr	nc	1,143	nc	340
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	61,479	nc	15,240	nc	5,878

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	23,098	nc	10,174	nc	5,901
Marijuana	21,114	21,187	7,756	7,902	4,822	4,933
Cocaine	6,775	6,873	1,140	1,221	376	464
Crack	1,693^a	1,426	133	92	69	45
Heroin	1,185	981	346	293	172	116
Hallucinogens	nc	8,514	nc	1,146	nc	327
LSD	3,922	3,702	211	231	78	45
PCP	635	600	4	25	*	8
Ecstasy	nc	6,030	nc	741	nc	195
Inhalants	nc	4,902	nc	278	nc	90
Methamphetamine	nc	2,738	nc	406	nc	174
Misuse of Psychotherapeutics³	nc	nr	nc	4,148	nc	1,410
Pain Relievers	nc	nr	nc	2,818	nc	820
Tranquilizers	nc	nr	nc	1,342	nc	400
Stimulants	nc	nr	nc	1,316	nc	433
Sedatives	nc	nr	nc	337	nc	115
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	14,205	nc	5,379	nc	2,022

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	60.3	nc	26.5	nc	15.4
Marijuana	55.7	55.3	20.5	20.6	12.7	12.9
Cocaine	17.9	17.9	3.0	3.2	1.0	1.2
Crack	4.5^a	3.7	0.4	0.2	0.2	0.1
Heroin	3.1	2.6	0.9	0.8	0.5	0.3
Hallucinogens	nc	22.2	nc	3.0	nc	0.9
LSD	10.4	9.7	0.6	0.6	0.2	0.1
PCP	1.7	1.6	0.0	0.1	*	0.0
Ecstasy	nc	15.7	nc	1.9	nc	0.5
Inhalants	nc	12.8	nc	0.7	nc	0.2
Methamphetamine	nc	7.1	nc	1.1	nc	0.5
Misuse of Psychotherapeutics³	nc	nr	nc	10.8	nc	3.7
Pain Relievers	nc	nr	nc	7.4	nc	2.1
Tranquilizers	nc	nr	nc	3.5	nc	1.0
Stimulants	nc	nr	nc	3.4	nc	1.1
Sedatives	nc	nr	nc	0.9	nc	0.3
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	37.1	nc	14.0	nc	5.3

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	81,132	nc	20,107	nc	11,188
Marijuana	73,618	74,374	12,952	13,758	8,699	8,619
Cocaine	28,322	27,588	1,641	1,579	642	779
Crack	7,149	7,066	494	626	249	309
Heroin	2,909^a	3,468	272	298	165	120
Hallucinogens	nc	25,155	nc	570	nc	155
LSD	18,370	18,602	64	74	25	35
PCP	5,388	5,395	16	29	*	*
Ecstasy	nc	7,381	nc	196	nc	22
Inhalants	nc	15,129	nc	310	nc	136
Methamphetamine	nc	10,567	nc	938	nc	582
Misuse of Psychotherapeutics³	nc	nr	nc	8,000	nc	2,697
Pain Relievers	nc	nr	nc	5,696	nc	1,850
Tranquilizers	nc	nr	nc	2,440	nc	730
Stimulants	nc	nr	nc	907	nc	346
Sedatives	nc	nr	nc	806	nc	224
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	47,275	nc	9,861	nc	3,856

Results from the 2015 National Survey on Drug Use and Health:Detailed Tables

Acknowledgments

Table of Contents

List of Tables Containing Prevalence Estimates and Sample Sizes - Table Types A, B, and N (If Applicable)

List of Tables Containing Standard Errors and P Values - Table Types C, D, and P (If Applicable)

Introduction

SURVEY DESIGN

BREAKS IN TRENDS DUE TO QUESTIONNAIRE AND OTHER CHANGES

2015 NSDUH Redesign Changes and Impact

Previous Mental Health Changes and Impact

Changes to Previously Published Estimates

New 2002 Baseline

TABLE PRESENTATION

Table Numbering

Table Types and Purpose

Table Indicators

Missingness

Rounding and Effect on Significance Testing

Definitions of Totals

LOCATING A TABLE

PRINTING A TABLE

General PDF Printing Instructions

Illicit Drug Use Tables – 1.1 to 1.158 (Numbers in Thousands and Percentages)

Illicit Drug Use Tables – 1.1 to 1.158 (Standard Errors and P Values)

Tobacco Product and Alcohol Use Tables – 2.1 to 2.88 (Numbers in Thousands and Percentages)

Tobacco Product and Alcohol Use Tables – 2.1 to 2.88 (Standard Errors and P Values)

Risk and Protective Factor Tables – 3.1 to 3.38 (Numbers in Thousands and Percentages)

Risk and Protective Factor Tables – 3.1 to 3.38 (Standard Errors and P Values)

Incidence Tables – 4.1 to 4.20 (Numbers in Thousands and Percentages)

Incidence Tables – 4.1 to 4.20 (Standard Errors and P Values)

Substance Use Disorder and Treatment Tables – 5.1 to 5.62 (Numbers in Thousands and Percentages)

Substance Use Disorder and Treatment Tables – 5.1 to 5.62 (Standard Errors and P Values)

Miscellaneous Tables – 6.1 to 6.107 (Numbers in Thousands and Percentages)

Miscellaneous Tables – 6.1 to 6.107 (Standard Errors and P Values)

Trend Tables – 7.1 to 7.51 (Numbers in Thousands and Percentages)

Trend Tables – 7.1 to 7.51 (Standard Errors and P Values)

Adult Mental Health Tables – 8.1 to 8.87 (Numbers in Thousands and Percentages)

Adult Mental Health Tables – 8.1 to 8.87 (Standard Errors and P Values)

Youth Mental Health Tables – 9.1 to 9.17 (Numbers in Thousands and Percentages)

Youth Mental Health Tables – 9.1 to 9.17 (Standard Errors and P Values)

Adult Mental Health Trend Tables – 10.1 to 10.41 (Numbers in Thousands and Percentages)

Adult Mental Health Trend Tables – 10.1 to 10.41 (Standard Errors and P Values)

Youth Mental Health Trend Tables – 11.1 to 11.6 (Numbers in Thousands and Percentages)

Youth Mental Health Trend Tables – 11.1 to 11.6 (Standard Errors and P Values)

Sample Size and Population Tables – 12.1 to 12.11 (Numbers in Thousands and Survey Sample Size)

Sample Size and Population Tables – 12.1 to 12.11 (Standard Errors)

Results from the 2015 National Survey on Drug Use and Health:
Detailed Tables

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	47.8	nc	11.9	nc	6.6
Marijuana	44.0	43.9	7.7	8.1	5.2	5.1
Cocaine	16.9	16.3	1.0	0.9	0.4	0.5
Crack	4.3	4.2	0.3	0.4	0.1	0.2
Heroin	1.7	2.0	0.2	0.2	0.1	0.1
Hallucinogens	nc	14.8	nc	0.3	nc	0.1
LSD	11.0	11.0	0.0	0.0	0.0	0.0
PCP	3.2	3.2	0.0	0.0	*	*
Ecstasy	nc	4.4	nc	0.1	nc	0.0
Inhalants	nc	8.9	nc	0.2	nc	0.1
Methamphetamine	nc	6.2	nc	0.6	nc	0.3
Misuse of Psychotherapeutics³	nc	nr	nc	4.7	nc	1.6
Pain Relievers	nc	nr	nc	3.4	nc	1.1
Tranquilizers	nc	nr	nc	1.4	nc	0.4
Stimulants	nc	nr	nc	0.5	nc	0.2
Sedatives	nc	nr	nc	0.5	nc	0.1
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	27.9	nc	5.8	nc	2.3

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	69,822	nc	26,576	nc	16,164
Marijuana	63,633	63,490	21,196	20,934	14,033	13,715
Cocaine	23,917	23,269	2,965	3,069	991	1,234
Crack	6,163	5,903	479	598	206	268
Heroin	3,451	3,540	622	548	284	238
Hallucinogens	nc	24,410	nc	3,039	nc	885
LSD	15,950	15,830	863^a	1,047	195	264
PCP	4,306	4,322	43	69	10	11
Ecstasy	nc	10,526	nc	1,651	nc	390
Inhalants	nc	16,103	nc	997	nc	328
Methamphetamine	nc	8,856	nc	1,166	nc	631
Misuse of Psychotherapeutics³	nc	nr	nc	10,121	nc	3,342
Pain Relievers	nc	nr	nc	6,924	nc	2,110
Tranquilizers	nc	nr	nc	3,148	nc	974
Stimulants	nc	nr	nc	3,027	nc	877
Sedatives	nc	nr	nc	596	nc	153
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	42,674	nc	13,551	nc	5,327

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	60,788	nc	21,154	nc	10,915
Marijuana	53,580	54,375	13,927^b	15,109	8,155	8,511
Cocaine	15,283	15,475	1,588	1,758	539	641
Crack	3,261	3,132	294	235	149	126
Heroin	1,362	1,559	292	280	151	91
Hallucinogens	nc	16,506	nc	1,653	nc	355
LSD	9,085	9,494	426	487	93	88
PCP	2,082	2,001	47	51	*	14
Ecstasy	nc	7,803	nc	909	nc	167
Inhalants	nc	9,662	nc	762	nc	199
Methamphetamine	nc	5,655	nc	547	nc	266
Misuse of Psychotherapeutics³	nc	nr	nc	8,821	nc	3,024
Pain Relievers	nc	nr	nc	5,538	nc	1,665
Tranquilizers	nc	nr	nc	2,903	nc	900
Stimulants	nc	nr	nc	2,224	nc	776
Sedatives	nc	nr	nc	915	nc	293
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	34,358	nc	10,988	nc	3,945

Drug	Lifetime (2014)	Lifetime (2015)	Past Year (2014)	Past Year (2015)	Past Month (2014)	Past Month (2015)
* = low precision; -- = not available; da = does not apply; nc = not comparable due to methodological changes; nr = not reported due to measurement issues. NOTE: Misuse of prescription drugs is defined as use in any way not directed by a doctor, including use without a prescription of one's own medication; use in greater amounts, more often, or longer than told to take a drug; or use in any other way not directed by a doctor. Prescription drugs do not include over-the-counter drugs. ^a The difference between this estimate and the 2015 estimate is statistically significant at the .05 level. Rounding may make the estimates appear identical. ^b The difference between this estimate and the 2015 estimate is statistically significant at the .01 level. Rounding may make the estimates appear identical. ¹ Illicit Drug Use includes the misuse of prescription psychotherapeutics or the use of marijuana, cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. Illicit Drug Use Other Than Marijuana Use includes the misuse of prescription psychotherapeutics or the use of cocaine (including crack), heroin, hallucinogens, inhalants, or methamphetamine. ² Illicit Drug Use in the Lifetime includes the misuse of prescription psychotherapeutics even though those estimates are not reported due to potential underreporting. ³ Prescription Psychotherapeutics include pain relievers, tranquilizers, stimulants, or sedatives and do not include over-the-counter drugs. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2014 and 2015.
ILLICIT DRUGS^1,2	nc	44.1	nc	15.3	nc	7.9
Marijuana	39.2	39.4	10.2^a	11.0	6.0	6.2
Cocaine	11.2	11.2	1.2	1.3	0.4	0.5
Crack	2.4	2.3	0.2	0.2	0.1	0.1
Heroin	1.0	1.1	0.2	0.2	0.1	0.1
Hallucinogens	nc	12.0	nc	1.2	nc	0.3
LSD	6.6	6.9	0.3	0.4	0.1	0.1
PCP	1.5	1.5	0.0	0.0	*	0.0
Ecstasy	nc	5.7	nc	0.7	nc	0.1
Inhalants	nc	7.0	nc	0.6	nc	0.1
Methamphetamine	nc	4.1	nc	0.4	nc	0.2
Misuse of Psychotherapeutics³	nc	nr	nc	6.4	nc	2.2
Pain Relievers	nc	nr	nc	4.0	nc	1.2
Tranquilizers	nc	nr	nc	2.1	nc	0.7
Stimulants	nc	nr	nc	1.6	nc	0.6
Sedatives	nc	nr	nc	0.7	nc	0.2
ILLICIT DRUGS OTHER THAN MARIJUANA^1,2	nc	24.9	nc	8.0	nc	2.9