Year |
Age |
Age |
Age |
Age |
Total |
12-17 |
18-24 |
25-34 |
35+ |
||
1991
|
53.60%
|
78.50%
|
73.20%
|
55.60%
|
62.10%
|
1992
|
51.00%
|
77.50%
|
69.80%
|
52.50%
|
59.10%
|
1993
|
55.40%
|
80.30%
|
69.70%
|
50.80%
|
58.70%
|
1994
|
57.60%
|
79.10%
|
71.10%
|
53.90%
|
60.80%
|
1995
|
na
|
na
|
na
|
na
|
na
|
1996
|
57.70%
|
77.50%
|
67.70%
|
53.50%
|
59.50%
|
1997
|
57.90%
|
77.00%
|
68.40%
|
54.50%
|
60.10%
|
1998
|
56.30%
|
77.10%
|
66.90%
|
52.20%
|
58.20%
|
1999
|
56.50%
|
76.60%
|
65.20%
|
50.20%
|
56.80%
|
2000
|
54.20%
|
75.60%
|
63.30%
|
48.10%
|
54.70%
|
2001
|
55.30%
|
76.80%
|
63.40%
|
50.70%
|
56.60%
|
2002
|
54.90%
|
77.50%
|
67.40%
|
52.00%
|
58.10%
|
2003
|
53.70%
|
78.00%
|
65.60%
|
53.60%
|
58.80%
|
2004
|
52.40%
|
76.30%
|
66.40%
|
52.20%
|
57.60%
|
2005
|
50.90%
|
76.50%
|
66.50%
|
51.60%
|
57.10%
|
Average |
54.81% |
77.45% |
67.47% |
52.24% |
58.44% |
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.