Source: Monitoring the Future
| Ratios of Amphetamine Use vs Marijuana Use and Alcohol Use Among 8th Grade Students -- Lifetime (1991 - 2005) | |||
|---|---|---|---|
| Year | Amphetamine Use Rate (%) | Ratio vs Marijuana | Ratio vs Alcohol |
| 1991 | 10.5 | 1.03 | 0.15 |
| 1992 | 10.8 | 0.96 | 0.16 |
| 1993 | 11.8 | 0.94 | 0.21 |
| 1994 | 12.3 | 0.74 | 0.22 |
| 1995 | 13.1 | 0.66 | 0.24 |
| 1996 | 13.5 | 0.58 | 0.24 |
| 1997 | 12.3 | 0.54 | 0.23 |
| 1998 | 11.3 | 0.51 | 0.22 |
| 1999 | 10.7 | 0.49 | 0.21 |
| 2000 | 9.9 | 0.49 | 0.19 |
| 2001 | 10.2 | 0.50 | 0.20 |
| 2002 | 8.7 | 0.45 | 0.19 |
| 2003 | 8.4 | 0.48 | 0.18 |
| 2004 | 7.5 | 0.46 | 0.17 |
| 2005 | 7.4 | 0.45 | 0.18 |
| Averages: | 10.8 | 0.63 | 0.20 |
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