Table 2.2 Admissions by alcohol/drug co-abuse: TEDS 1997-2007 Number and percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions. See Table 4.2a.]
Alcohol/drug co-abuse	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
	Number
Total	1,607,957	1,712,268	1,725,885	1,759,061	1,780,239	1,900,586	1,867,796	1,822,610	1,885,507	1,893,425	1,817,577
Drug primary	773,135	834,622	854,663	900,647	943,396	1,022,040	1,037,877	1,034,804	1,098,661	1,094,116	1,029,836
Drug only	413,056	452,759	473,270	519,917	554,104	605,180	629,325	637,288	690,074	698,051	661,340
Drug w/secondary alcohol	360,079	381,863	381,393	380,730	389,292	416,860	408,552	397,516	408,587	396,065	368,496
Alcohol primary	796,674	828,252	824,641	813,047	788,259	813,577	776,091	733,232	741,987	756,694	732,925
Alcohol only	445,699	462,692	461,532	454,412	433,620	448,972	430,990	404,459	408,422	413,932	406,038
Alcohol w/secondary drug	350,975	365,560	363,109	358,635	354,639	364,605	345,101	328,773	333,565	342,762	326,887
No primary substance reported	38,148	49,394	46,581	45,367	48,584	64,969	53,828	54,574	44,859	42,615	54,816
	Percent distribution
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Drug primary	48.1	48.7	49.5	51.2	53.0	53.8	55.6	56.8	58.3	57.8	56.7
Drug only	25.7	26.4	27.4	29.6	31.1	31.8	33.7	35.0	36.6	36.9	36.4
Drug w/secondary alcohol	22.4	22.3	22.1	21.6	21.9	21.9	21.9	21.8	21.7	20.9	20.3
Alcohol primary	49.5	48.4	47.8	46.2	44.3	42.8	41.6	40.2	39.4	40.0	40.3
Alcohol only	27.7	27.0	26.7	25.8	24.4	23.6	23.1	22.2	21.7	21.9	22.3
Alcohol w/secondary drug	21.8	21.3	21.0	20.4	19.9	19.2	18.5	18.0	17.7	18.1	18.0
No primary substance reported	2.4	2.9	2.7	2.6	2.7	3.4	2.9	3.0	2.4	2.3	3.0
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.6.08.