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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
Change
|
|
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
|
1991
|
1992
|
1993
|
1994
|
1995
|
1996
|
1997
|
1998
|
1999
|
2000
|
2001
|
|
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).
Last Updated: April 22, 2002
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