Estimated 30-Day Prevalence of Use of Various Drugs for Grades 8, 10, and 12 Combined

Source: 

Johnston, L. D., O’Malley, P. M., Miech, R. A., Bachman, J. G., & Schulenberg, J. E. (February 2015). Monitoring the Future national survey results on drug use: 1975-2014: Overview, key findings on adolescent drug use. Ann Arbor: Institute for Social Research, The University of Michigan, Table 3, p. 57.
http://monitoringthefuture.org...

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