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. (2017). Monitoring the Future national survey results on drug use, 1975-2016: Overview, key findings on adolescent drug use. Ann Arbor: Institute for Social Research, The University of Michigan, pp. 58-59, Table 3.
http://monitoringthefuture.org...

Region: