Excerpt from Introduction:. . . The 2006 Monitoring the Future survey encompassed nearly 50,000 8th-, 10th-, and 12thgrade students in over 400 secondary schools nationwide. The first published results are presented in this report. Recent trends in the use of licit and illicit drugs are emphasized, as well as trends in the levels of perceived risk and personal disapproval associated with each drug. This study has shown these beliefs and attitudes to be particularly important in explaining trends in use. In addition, trends in the perceived availability of each drug are presented.A synopsis of the methods used in the study and an overview of the key results from the 2006 surveyfollow this introductory section. Next is a section for each individual drug class, providing figures that show trends in the overall proportions of students at each grade level (a) using the drug, (b) seeing a great risk associated with its use, (c) disapproving of its use, and (d) saying that they could get it fairly easily or very easily. Annual trends are provided for 8th and 10th graders from 1991-2006, and for 12th graders from 1975-2006. These represent the years for which data on each grade are available. The tables at the end of this report provide the statistics underlying the figures; in addition, they present data on lifetime, annual, 30-day, and (for selected drugs) daily prevalence. . . .