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Source: Monitoring the Future, Vols I & II (2009)
| Trends in Marijuana Use Among Young Adults -- Past Month Use (1986 - 2008) | |||
|---|---|---|---|
| Year | Ages 19 to 28 | College Students | 12th Grade Students |
| 1986 | 22.0 | 22.3 | 23.4 |
| 1987 | 20.7 | 20.3 | 21.0 |
| 1988 | 17.9 | 16.8 | 18.0 |
| 1989 | 15.5 | 16.3 | 16.7 |
| 1990 | 13.9 | 14.0 | 14.0 |
| 1991 | 13.5 | 14.1 | 13.8 |
| 1992 | 13.3 | 14.6 | 11.9 |
| 1993 | 13.4 | 14.2 | 15.5 |
| 1994 | 14.1 | 15.1 | 19.0 |
| 1995 | 14.0 | 18.6 | 21.2 |
| 1996 | 15.1 | 17.5 | 21.9 |
| 1997 | 15.0 | 17.7 | 23.7 |
| 1998 | 14.9 | 18.6 | 22.8 |
| 1999 | 15.6 | 20.7 | 23.1 |
| 2000 | 16.1 | 20.0 | 21.6 |
| 2001 | 16.7 | 20.2 | 22.4 |
| 2002 | 16.9 | 19.7 | 21.5 |
| 2003 | 17.3 | 19.3 | 21.2 |
| 2004 | 16.5 | 18.9 | 19.9 |
| 2005 | 16.7 | 20.2 | 22.4 |
| 2006 | 16.9 | 19.7 | 21.5 |
| 2007 | 17.3 | 19.3 | 21.2 |
| 2008 | 16.5 | 18.9 | 19.9 |
Drug Use Trends for Each Demographic Group
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| 19 to 28 Year Olds | College Students | 12th Grade Students |
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