Table 3.6. Heroin admissions aged 12 and older, by usual route of administration, age group, and characteristics of first treatment episode: 2000-2010 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions.]
Usual route of administration, age group, and characteristics of first treatment episode	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010
Total heroin admissions	269,891	277,321	284,359	273,821	262,373	260,390	266,804	261,558	280,099	284,484	256,256
Injection	62.6	61.0	61.6	60.4	62.1	62.8	63.5	64.1	64.7	66.6	69.7
Age group
12 to 19 years	1.9	1.8	1.8	1.8	1.9	2.0	1.9	1.9	2.2	2.5	2.6
20 to 34 years	24.1	24.9	25.6	26.0	28.0	29.1	30.7	32.2	34.3	37.4	41.0
35 to 44 years	22.0	20.2	19.2	17.8	17.3	16.8	15.9	15.3	14.1	13.6	13.1
45 years and older	14.7	14.1	15.0	14.8	14.9	14.9	14.9	14.7	14.2	13.2	13.0
First treatment episode (%)	19.8	19.3	20.3	19.8	19.3	23.1	22.2	20.4	20.4	21.1	18.2
Average years of use before     first treatment episode	13.1	12.8	12.4	12.7	12.6	12.9	13.6	13.5	12.5	11.6	10.7
Inhalation	31.9	33.6	33.2	34.1	33.0	33.1	32.5	31.8	30.9	28.9	25.4
Age group
12 to 19 years	0.9	0.8	0.8	0.8	0.7	0.8	0.7	0.6	0.7	0.6	0.5
20 to 34 years	13.8	13.7	12.7	12.0	11.1	10.6	9.7	9.0	8.9	8.5	7.7
35 to 44 years	12.3	13.3	13.3	13.8	13.4	13.2	12.5	12.0	11.0	9.6	7.8
45 years and older	5.0	5.7	6.4	7.5	7.8	8.5	9.6	10.2	10.4	10.1	9.4
First treatment episode (%)	25.8	26.0	25.7	25.0	25.6	28.8	27.7	24.0	23.3	24.5	21.6
Average years of use before     first treatment episode	11.1	11.7	12.1	13.0	13.2	13.1	14.1	15.0	14.2	14.3	14.4
Other	5.4	5.4	5.2	5.5	4.9	4.1	4.0	4.1	4.3	4.4	4.9
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
No. of admissions	252,296	259,209	265,735	255,678	244,048	258,117	264,939	260,130	278,520	283,674	255,568
SOURCE: Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.10.11.