Overview of Drug Use in the United States - Infoplease.com - 0 views
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About 22.5 million Americans aged 12 or older in 2004 were classified with past year substance dependence or abuse (9.4% of the population), about the same number as in 2002 and 2003. Of these, 3.4 million were classified with dependence on or abuse of both alcohol and illicit drugs, 3.9 million were dependent on or abused illicit drugs but not alcohol, and 15.2 million were dependent on or abused alcohol but not illicit drugs.