Ratios of Lifetime Amphetamine Use vs Marijuana Use Among 8th, 10th and 12th Grade Students

Source: Monitoring the Future

Ratios of Amphetamine to Marijuana Use -- Lifetime Use (1991 - 2005)
Year 12th Grade 10th Grade 8th Grade
1991 0.42 0.56 1.03
1992 0.43 0.61 0.96
1993 0.43 0.61 0.94
1994 0.41 0.50 0.74
1995 0.37 0.51 0.66
1996 0.34 0.44 0.58
1997 0.33 0.40 0.54
1998 0.33 0.40 0.51
1999 0.33 0.38 0.49
2000 0.32 0.39 0.49
2001 0.33 0.40 0.50
2002 0.35 0.39 0.45
2003 0.31 0.36 0.48
2004 0.33 0.34 0.46
2005 0.29 0.33 0.45
Averages: 0.36 0.45 0.63

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Past Year vs Marijuana Past Month 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 Amphetamine vs Alcohol Use Ratios Youth Drug Use Overview

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