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

Source: Monitoring the Future

Ratios of Heroin to Marijuana Use -- Past Month Use (1991 - 2005)
Year 12th Grade 10th Grade 8th Grade
1991 0.014 0.023 0.094
1992 0.025 0.025 0.108
1993 0.013 0.028 0.078
1994 0.016 0.025 0.077
1995 0.028 0.035 0.066
1996 0.023 0.025 0.062
1997 0.021 0.029 0.059
1998 0.022 0.037 0.062
1999 0.022 0.036 0.062
2000 0.032 0.025 0.055
2001 0.018 0.015 0.065
2002 0.023 0.028 0.060
2003 0.019 0.018 0.053
2004 0.025 0.031 0.078
2005 0.025 0.033 0.076
Averages: 0.022 0.027 0.070

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
Other Drugs vs Marijuana Use Ratios Heroin vs Alcohol Use Ratios Youth Drug Use Overview

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