The 2001 National Household Survey on Drug Abuse (NHSDA) questioned respondents aged 12 or older about whether they had operated a vehicle while under the influence of illegal drugs during the past 12 months. The self-reported data revealed that over 8 million people aged 12 and over reported driving while under the influence of illegal drugs. This represents approximately 3.6 percent of the United States population. Males were more than twice as likely to report driving while under the influence of drugs than were females. White respondents were more likely than Hispanic, Black, or Asian respondents to report drugged driving. The survey also revealed that among adults aged 18 and over, those who were either unemployed or enrolled full- or part-time as students were most likely to drive while under the influence of illegal drugs. Drugged driving incidents were lowest among people who were not in the labor force, such as retired or disabled persons. 4 Figures