Source: Monitoring the Future
| Comparison Trends in Marijuana Use -- Past Month Use (1991 - 2005) | |||
|---|---|---|---|
| Year | 12th Grade | 10th Grade | 8th Grade |
| 1991 | 13.8 | 8.7 | 3.2 |
| 1992 | 11.9 | 8.1 | 3.7 |
| 1993 | 15.5 | 10.9 | 5.1 |
| 1994 | 19.0 | 15.8 | 7.8 |
| 1995 | 21.2 | 17.2 | 9.1 |
| 1996 | 21.9 | 20.4 | 11.3 |
| 1997 | 23.7 | 20.5 | 10.2 |
| 1998 | 22.8 | 18.7 | 9.7 |
| 1999 | 23.1 | 19.4 | 9.7 |
| 2000 | 21.6 | 19.7 | 9.1 |
| 2001 | 22.4 | 19.8 | 9.2 |
| 2002 | 21.5 | 17.8 | 8.3 |
| 2003 | 21.2 | 17.0 | 7.5 |
| 2004 | 19.9 | 15.9 | 6.4 |
| 2005 | 19.8 | 15.2 | 6.6 |
| Averages: | 20.0 | 16.4 | 7.9 |
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