00000nam a2200000 a 4500 USA Zahlen & Fakten XTC Studie Illegale Drogen Drogen Designerdrogen MDMA (Ecstasy): Trends in Annual Use, Risk, Disapproval, and Availability Eight, Tenth, and Twelfth Graders. Figure 1 o.A. W:\Digitale Publikationen\Sucht\Suall\Monitoring the Future 2003\00445291_Figure 1_MDMA_TrendsAnnualUse.pdf University of Michigan, Survey Research Center 1. S.