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. "Appendix B: Data Sources." Informing America's Policy on Illegal Drugs: What We Don't Know Keeps Hurting Us. Washington, DC: The National Academies Press, 2001.
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TABLE B.2 1999 Lifetime and Past-Month Prevalence of Marijuana and Cocaine Use for 10th and 12th Graders
Past Month Use
Year in School
NOTE: MTF=Monitoring the Future. YRBSS=Youth Risk Behavior Surveillance System.
SOURCES: Monitoring the Future: National Results on Adolescent Drug Use, Overview of Key Findings. National Institute on Drug Abuse: Washington DC. Available on-line October 9, 2000 at http://monitoringthefuture.org/new.html; and Youth Risk Behavior Surveillance—1999. Centers for Disease Control: Washington DC. Available on-line October 9, 2000 at http://www.cdc.gov/mmwr/preview/mmwrhtml/ss4905a1.htm.