|
Source: Monitoring the Future, Vol I (2009), Tables 5-5a, 5-5b and 5-5c, pp. 202-13
| Ratios of Tranquilizer Use vs Marijuana Use Among 8th Grade Students (1991 - 2008) | |||
|---|---|---|---|
| Year | Lifetime | Past Year | Past Month |
| 1991 | 0.37 | 0.29 | 0.25 |
| 1992 | 0.37 | 0.28 | 0.22 |
| 1993 | 0.35 | 0.23 | 0.18 |
| 1994 | 0.28 | 0.18 | 0.14 |
| 1995 | 0.23 | 0.17 | 0.13 |
| 1996 | 0.23 | 0.18 | 0.13 |
| 1997 | 0.21 | 0.16 | 0.12 |
| 1998 | 0.21 | 0.15 | 0.12 |
| 1999 | 0.20 | 0.15 | 0.11 |
| 2000 | 0.22 | 0.17 | 0.15 |
| 2001 | 0.25 | 0.18 | 0.13 |
| 2002 | 0.22 | 0.18 | 0.14 |
| 2003 | 0.25 | 0.21 | 0.19 |
| 2004 | 0.25 | 0.21 | 0.19 |
| 2005 | 0.25 | 0.23 | 0.20 |
| 2006 | 0.27 | 0.22 | 0.20 |
| 2007 | 0.27 | 0.23 | 0.19 |
| 2008 | 0.27 | 0.22 | 0.21 |
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