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Introduction to Volume II
Overview of Key Findings
Study Design and Procedures
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22 year olds adjusted for inconsistency Adults by Age AGE AT ADMINISTRATION age bands Age Group 30 age strata alcohol amphetamines annual prevalence rates Annual Thirty-Day barbiturates binge drinking cigarette smoking cocaine cohort effect crack crack cocaine crystal methamphetamine decline disapproval drug was asked eighth and tenth eighth graders Female College Students Figure Full-Time College Students Future Study gender difference hallucinogens heroin high school seniors illicit drug inconsistency in self-reports increase inhalants Large City levels Lifetime prevalence estimates MDMA methaqualone modal age 18 Monitoring the Future narcotics older age groups perceived risk percentage points population density Prevalence Among High Prevalence of Daily proportion reported sample self-reports of drug Seniors and Young showed six questionnaire forms Table tenth graders Thirty-Day Prevalence tranquilizers trend estimates Trends in Annual twelfth graders Types of Drugs Yean z z z