Ratios of Past Month Cocaine Use vs Marijuana Use Among 8th, 10th and 12th Grade Students

Source: Monitoring the Future

Ratios of Cocaine to Marijuana Use -- Past Month Use (1991 - 2005)
Year 12th Grade 10th Grade 8th Grade
1991 0.10 0.08 0.16
1992 0.11 0.09 0.19
1993 0.08 0.08 0.14
1994 0.08 0.08 0.13
1995 0.08 0.10 0.13
1996 0.09 0.08 0.12
1997 0.10 0.10 0.11
1998 0.11 0.11 0.14
1999 0.11 0.09 0.13
2000 0.10 0.09 0.13
2001 0.09 0.07 0.13
2002 0.11 0.09 0.13
2003 0.10 0.08 0.12
2004 0.12 0.11 0.14
2005 0.12 0.10 0.15
Averages: 0.10 0.09 0.14

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Lifetime vs Marijuana Past Year vs Marijuana New Use vs Marijuana
Use Ratios Among Age 19 to 28 Use Ratios Among College Students Use Ratios Among 12th Grade Students
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