Year |
Age |
Age |
Age |
Age |
Total |
12-17 |
18-24 |
25-34 |
35+ |
||
|
1991
|
2.20%
|
2.70%
|
0.80%
|
0.20%
|
0.90%
|
|
1992
|
1.50%
|
2.00%
|
0.70%
|
0.00%
|
0.60%
|
|
1993
|
1.80%
|
2.40%
|
0.80%
|
0.20%
|
0.80%
|
|
1994
|
2.40%
|
2.70%
|
0.40%
|
0.20%
|
0.80%
|
|
1995
|
2.60%
|
1.70%
|
0.60%
|
0.20%
|
0.70%
|
|
1996
|
na
|
na
|
na
|
na
|
na
|
|
1997
|
na
|
na
|
na
|
na
|
na
|
|
1998
|
3.40%
|
5.30%
|
1.00%
|
0.20%
|
1.40%
|
|
1999
|
3.90%
|
5.40%
|
1.60%
|
0.80%
|
1.80%
|
|
2000
|
3.50%
|
5.00%
|
1.20%
|
0.70%
|
1.60%
|
|
2001
|
3.60%
|
5.50%
|
1.50%
|
0.80%
|
1.80%
|
|
2002
|
4.40%
|
6.00%
|
2.20%
|
0.60%
|
2.00%
|
|
2003
|
3.80%
|
5.90%
|
1.60%
|
0.80%
|
1.90%
|
|
2004
|
3.80%
|
6.00%
|
1.70%
|
0.80%
|
1.90%
|
|
2005
|
3.20%
|
6.00%
|
2.30%
|
0.70%
|
1.90%
|
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.