Year |
Age |
Age |
Age |
Age |
Total |
17-Dec |
18-24 |
25-34 |
35+ |
||
1990
|
5.20%
|
12.70%
|
8.60%
|
1.90%
|
5.10%
|
1991
|
4.30%
|
13.00%
|
7.00%
|
2.10%
|
4.80%
|
1992
|
4.00%
|
11.00%
|
8.20%
|
1.60%
|
4.40%
|
1993
|
4.90%
|
11.10%
|
6.70%
|
1.90%
|
4.30%
|
1994
|
6.00%
|
12.10%
|
6.90%
|
2.30%
|
4.80%
|
1995
|
8.20%
|
12.00%
|
6.70%
|
1.80%
|
4.70%
|
1996
|
7.10%
|
13.20%
|
6.30%
|
2.00%
|
4.70%
|
1997
|
9.40%
|
12.80%
|
6.00%
|
2.60%
|
5.10%
|
1998
|
8.30%
|
13.80%
|
5.50%
|
2.50%
|
5.00%
|
1999
|
7.20%
|
14.20%
|
5.40%
|
2.20%
|
4.70%
|
2000
|
7.20%
|
13.60%
|
5.90%
|
2.30%
|
4.80%
|
2001
|
8.00%
|
16.00%
|
6.80%
|
2.40%
|
5.40%
|
2002
|
8.20%
|
17.30%
|
7.70%
|
3.10%
|
6.20%
|
2003
|
8.00%
|
17.20%
|
8.70%
|
2.90%
|
6.20%
|
2004
|
7.50%
|
16.40%
|
8.40%
|
3.10%
|
6.10%
|
2005
|
6.80%
|
16.80%
|
8.70%
|
2.90%
|
6.00%
|
Source: National Survey on Drug Use and Health; National Household Survey on Drug Abuse; Substance Abuse and Mental Health Services Administration (SAMHSA), Department of Health and Human Services.