DRUG USE
Table 5. Trends in 30-Day Prevalence of Selected Drugs Among 8th, 10th, and 12th Graders, Monitoring the Future Study, 1991–2001 (Percent Prevalence)
|
Selected drug/grade |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
2000-2001 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Marijuana/hashish |
||||||||||||
|
8th grade |
3.2 |
3.7 |
5.1 |
7.8 |
9.1 |
11.3 |
10.2 |
9.7 |
9.7 |
9.1 |
9.2 |
+0.1 |
|
10th grade |
8.7 |
8.1 |
10.9 |
15.8 |
17.2 |
20.4 |
20.5 |
18.7 |
19.4 |
19.7 |
19.8 |
0.0 |
|
12th grade |
13.8 |
11.9 |
15.5 |
19.0 |
21.2 |
21.9 |
23.7 |
22.8 |
23.1 |
21.6 |
22.4 |
+0.8 |
Inhalants1 |
|
8th grade |
4.4 |
4.7 |
5.4 |
5.6 |
6.1 |
5.8 |
5.6 |
4.8 |
5.0 |
4.5 |
4.0 |
-0.5 |
|
10th grade |
2.7 |
2.7 |
3.3 |
3.6 |
3.5 |
3.3 |
3.0 |
2.9 |
2.6 |
2.6 |
2.4 |
-0.1 |
|
12th grade2 |
2.4 |
2.3 |
2.5 |
2.7 |
3.2 |
2.5 |
2.5 |
2.3 |
2.0 |
2.2 |
1.7 |
-0.5 |
| Hallucinogens | ||||||||||||
|
8th grade |
0.8 |
1.1 |
1.2 |
1.3 |
1.7 |
1.9 |
1.8 |
1.4 |
1.3 |
1.2 |
1.2 |
0.0 |
|
10th grade |
1.6 |
1.8 |
1.9 |
2.4 |
3.3 |
2.8 |
3.3 |
3.2 |
2.9 |
2.3 |
2.1 |
-0.2 |
|
12th grade |
2.2 |
2.1 |
2.7 |
3.1 |
4.4 |
3.5 |
3.9 |
2.8 |
3.5 |
3.5 |
3.2 |
+0.6 |
| LSD | ||||||||||||
|
8th grade |
0.6 |
0.9 |
1.0 |
1.1 |
1.4 |
1.5 |
1.5 |
1.1 |
1.1 |
1.0 |
1.0 |
0.0 |
|
10th grade |
1.5 |
1.6 |
1.6 |
2.0 |
3.0 |
2.4 |
2.8 |
2.7 |
2.3 |
1.6 |
1.5 |
-0.2 |
|
12th grade |
1.9 |
2.0 |
2.4 |
2.6 |
4.0 |
2.5 |
3.1 |
3.2 |
2.7 |
1.6 |
2.3 |
+0.7s |
| Cocaine | ||||||||||||
|
8th grade |
0.5 |
0.7 |
0.7 |
1.0 |
1.2 |
1.3 |
1.1 |
1.4 |
1.3 |
1.2 |
1.2 |
-0.1 |
|
10th grade |
0.7 |
0.7 |
0.9 |
1.2 |
1.7 |
1.7 |
2.0 |
2.1 |
1.8 |
1.8 |
1.3 |
-0.4 |
|
12th grade |
1.4 |
1.3 |
1.3 |
1.5 |
1.8 |
2.0 |
2.3 |
2.4 |
2.6 |
2.1 |
2.1 |
-0.1 |
| Stimulants | ||||||||||||
|
8th grade |
2.6 |
3.3 |
3.6 |
3.6 |
4.2 |
4.6 |
3.8 |
3.3 |
3.4 |
3.4 |
3.2 |
-0.3 |
|
10th grade |
3.3 |
3.6 |
4.3 |
4.5 |
5.3 |
5.5 |
5.1 |
5.1 |
5.0 |
5.4 |
5.6 |
+0.2 |
|
12th grade |
3.2 |
2.8 |
3.7 |
4.0 |
4.0 |
4.1 |
4.8 |
4.6 |
4.5 |
5.0 |
5.6 |
+0.2 |
|
Alcohol (any use)3 |
||||||||||||
|
8th grade |
25.1 |
26.1 |
24.3 |
25.5 |
24.6 |
26.2 |
24.5 |
23.0 |
24.0 |
22.4 |
21.5 |
-0.9 |
|
10th grade |
42.8 |
39.9 |
38.2 |
39.2 |
38.8 |
40.4 |
40.1 |
38.8 |
40.0 |
41.0 |
39.0 |
-2.0 |
|
12th grade |
54.0 |
51.3 |
48.6 |
50.1 |
51.3 |
50.8 |
52.7 |
52.0 |
51.0 |
50.0 |
49.8 |
-0.3 |
Notes: Level of significance of difference between the two most recent classes: s=.05. Any inconsistency between the 2000–2001 change estimate and the respective prevalence estimates is due to rounding.
|
Approximate Ns |
|
|
|
|
|
|
|
|
|
|
|
|---|---|---|---|---|---|---|---|---|---|---|---|
|
8th grade |
17,500 |
18,600 |
18,300 |
17,300 |
17,500 |
17,800 |
18,600 |
18,100 |
16,700 |
17,300 |
16,200 |
|
10th grade |
14,800 |
14,800 |
15,300 |
15,800 |
17,000 |
15,600 |
15,500 |
15,000 |
13,600 |
14,600 |
14,000 |
|
12th grade |
15,000 |
15,800 |
16,300 |
15,400 |
15,400 |
14,300 |
15,400 |
15,200 |
13,600 |
13,300 |
12,800 |
1 Unadjusted for underreporting of amyl and butyl nitrites.
2 Data for 12th graders only are based on five of
six questionnaire forms; N is five-sixths of N indicated.
3 For all grades: For 1993, the question text was changed slightly
in one-half of the forms to indicate that a "drink" meant "more
than a few sips." For 1993, N is one-half of N indicated for all
groups. Data after 1993 were based on all forms for all grades.
Source: Institute for Social Research, University of Michigan, Monitoring the Future study (December 2001).
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