Table 5.7b Heroin admissions by selected usual route of administration, according to age group: TEDS 1995-2005 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions. See Table 4.2a.]
Usual route of administration and age group1	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005
Injection
Age group	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Under 20 years	1.2	1.7	2.4	3.1	3.0	3.0	3.0	2.9	2.9	3.1	3.2
20 to 29 years	17.1	18.1	20.0	21.6	22.9	23.9	26.4	27.8	29.3	31.7	33.2
30 to 39 years	42.0	40.0	37.2	34.7	33.1	31.8	30.8	29.2	28.1	26.9	26.7
40 years and over	39.7	40.2	40.4	40.6	41.0	41.3	39.8	40.1	39.7	38.3	36.9
Inhalation
Age group	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Under 20 years	3.0	2.9	3.7	3.7	3.5	2.8	2.5	2.4	2.4	2.2	2.3
20 to 29 years	34.2	30.6	28.5	26.6	24.8	22.5	21.1	19.9	18.5	18.9	19.2
30 to 39 years	42.4	43.4	42.7	41.8	42.3	42.4	41.8	39.9	37.8	35.2	32.7
40 years and over	20.5	23.2	25.1	27.9	29.3	32.2	34.6	37.7	41.3	43.6	45.8
Smoking
Age group	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Under 20 years	5.5	6.4	6.1	6.7	7.7	7.0	5.7	5.1	5.3	5.4	6.4
20 to 29 years	31.6	31.5	31.1	32.7	34.8	32.2	30.9	32.0	31.6	31.5	34.8
30 to 39 years	41.5	37.8	37.0	34.9	32.5	32.8	31.3	31.5	30.0	29.6	25.9
40 years and over	21.3	24.3	25.8	25.6	25.0	27.9	32.1	31.4	33.0	33.5	32.9
1 Usual route of administration and/or age group were not reported for all admissions.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.3.06.