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Source: Monitoring the Future, Vol I (2009), Table 5-5b, pp. 210-213
| Trends in Tranquilizer Use Among High School Students -- Past Month Use (1991 - 2008) | |||
|---|---|---|---|
| Year | 12th Grade | 10th Grade | 8th Grade |
| 1991 | 1.4 | 1.2 | 0.8 |
| 1992 | 1.0 | 1.5 | 0.8 |
| 1993 | 1.2 | 1.1 | 0.9 |
| 1994 | 1.4 | 1.5 | 1.1 |
| 1995 | 1.8 | 1.7 | 1.2 |
| 1996 | 2.0 | 1.7 | 1.5 |
| 1997 | 1.8 | 2.2 | 1.2 |
| 1998 | 2.4 | 2.2 | 1.2 |
| 1999 | 2.5 | 2.2 | 1.1 |
| 2000 | 2.6 | 2.5 | 1.4 |
| 2001 | 2.9 | 2.9 | 1.2 |
| 2002 | 3.3 | 2.9 | 1.2 |
| 2003 | 2.8 | 2.4 | 1.4 |
| 2004 | 3.1 | 2.3 | 1.2 |
| 2005 | 2.9 | 2.3 | 1.3 |
| 2006 | 2.7 | 2.4 | 1.3 |
| 2007 | 2.6 | 2.6 | 1.1 |
| 2008 | 2.6 | 1.9 | 1.2 |
Drug Use Trends for Each Demographic Group
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| 8th Grade Students | 10th Grade Students | 12th Grade Students |
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