|
Source: Monitoring the Future, Vol I (2009), Tables 5-5a, 5-5b and 5-5c, pp. 202-13
| Ratios of Amphetamine Use vs Marijuana Use Among 8th Grade Students (1991 - 2008) | |||
|---|---|---|---|
| Year | Lifetime | Past Year | Past Month |
| 1991 | 1.03 | 1.00 | 0.81 |
| 1992 | 0.96 | 0.90 | 0.89 |
| 1993 | 0.94 | 0.78 | 0.71 |
| 1994 | 0.74 | 0.61 | 0.46 |
| 1995 | 0.66 | 0.55 | 0.46 |
| 1996 | 0.58 | 0.50 | 0.41 |
| 1997 | 0.54 | 0.46 | 0.37 |
| 1998 | 0.51 | 0.43 | 0.34 |
| 1999 | 0.49 | 0.42 | 0.35 |
| 2000 | 0.49 | 0.42 | 0.37 |
| 2001 | 0.50 | 0.44 | 0.35 |
| 2002 | 0.45 | 0.38 | 0.34 |
| 2003 | 0.48 | 0.43 | 0.36 |
| 2004 | 0.46 | 0.42 | 0.36 |
| 2005 | 0.45 | 0.40 | 0.35 |
| 2006 | 0.46 | 0.40 | 0.32 |
| 2007 | 0.46 | 0.41 | 0.35 |
| 2008 | 0.47 | 0.41 | 0.38 |
Other Available Trend and Comparison Data
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