Findings revealed that the overall prevalence of alcohol, tobacco, and illicit drug use in the surveyed population declined between 1991 and 1992, continuing a pattern initiated in the late 1970's and early 1980's. About 11 million individuals in the surveyed population of 206 million had used illicit drugs in the past month, 54 million had smoked tobacco, and 98 million had drank alcohol. Among people ages 18-34, college graduates were about half as likely to be current users as those who had not completed high school. The use of alcohol alone remained the most common pattern of drug use. Cigarettes, inhalants, and alcohol were typically the first drugs used, followed by marijuana, cocaine, hallucinogens, and heroin. Tables, footnotes, and appended methodological information and instruments