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National Drug Control Strategy
Update 2003

February 2003

Table 10. Trends in Harmfulness of Drugs as Perceived by 12th Graders, Monitoring the Future Study, 1991�2002

Drug Behavior
Percentage saying “great risk“1
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2001-2002 Change
How much do you think people risk harming themselves (physically or in other ways), if they . . .
Try marijuana once or twice 27.1 24.5 21.9 19.5 16.3 15.6 14.9 16.7 15.7 13.7 15.3 16.1 +0.8
Smoke marijuana occasionally 40.6 39.6 35.6 30.1 25.6 25.9 24.7 24.4 23.9 23.4 23.5 23.2 -0.3
Smoke marijuana regularly 78.6 76.5 72.5 65.0 60.8 59.9 58.1 58.5 57.4 58.3 57.4 53.0 -4.4s
Try crack once or twice 60.6 62.4 57.6 58.4 54.6 56.0 54.0 52.2 48.2 48.4 49.4 50.8 +1.4
Take crack occasionally 76.5 76.3 73.9 73.8 72.8 71.4 70.3 68.7 67.3 65.8 65.4 65.6 +0.2
Try cocaine powder once or twice 53.6 57.1 53.2 55.4 52.0 53.2 51.4 48.5 46.1 47.0 49.0 49.5 +0.5
Take cocaine powder occasionally 69.8 70.8 68.6 70.6 69.1 68.8 67.7 65.4 64.2 64.7 63.2 64.4 +1.2
Approximate N 2,549 2,684 2,759 2,591 2,603 2,449 2,579 2,500 2,300 2,130 2,173 2,198  
Note: s=.05; any inconsistency between the 2000–2001 change estimate and the respective prevalence estimates is due to rounding.
1Answer alternatives were: (1) no risk, (2) slight risk, (3) moderate risk, (4) great risk, and (5) can't say, drug unfamiliar.
Source: Institute for Social Research, University of Michigan, Monitoring the Future study (December 2002).

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Last Updated: May 7, 2003