|
|
Source: Monitoring the Future, Vol I (2009), Tables 5-5a, 5-5b and 5-5c, pp. 202-13
| Ratios of Crack Use vs Marijuana Use Among 8th Grade Students (1991 - 2008) | |||
|---|---|---|---|
| Year | Lifetime | Past Year | Past Month |
| 1991 | 0.13 | 0.11 | 0.09 |
| 1992 | 0.14 | 0.13 | 0.14 |
| 1993 | 0.13 | 0.11 | 0.08 |
| 1994 | 0.14 | 0.10 | 0.09 |
| 1995 | 0.14 | 0.10 | 0.08 |
| 1996 | 0.13 | 0.10 | 0.07 |
| 1997 | 0.12 | 0.10 | 0.07 |
| 1998 | 0.14 | 0.12 | 0.09 |
| 1999 | 0.14 | 0.11 | 0.08 |
| 2000 | 0.15 | 0.12 | 0.09 |
| 2001 | 0.15 | 0.11 | 0.09 |
| 2002 | 0.13 | 0.11 | 0.10 |
| 2003 | 0.14 | 0.13 | 0.09 |
| 2004 | 0.15 | 0.11 | 0.09 |
| 2005 | 0.15 | 0.11 | 0.09 |
| 2006 | 0.15 | 0.11 | 0.09 |
| 2007 | 0.15 | 0.13 | 0.11 |
| 2008 | 0.14 | 0.10 | 0.09 |
Other Available Trend and Comparison Data
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