State Estimates of Persons Aged 18 or Older Driving Under the Influence of Alcohol or Illicit Drugs"
"Based on SAMHSA's National Survey on Drug Use and Health, in 2006 an estimated 30.5 million persons aged 12 or older reported driving under the influence of alcohol at least once in the past year and 10.2 million reported driving under the influence of illicit drugs during the past year. Illicit drugs included marijuana/hashish, cocaine, crack cocaine, inhalants, hallucinogens, heroin, or prescription-type drugs used nonmedically.

* Combined data from SAMHSA's 2004 to 2006 National Surveys on Drug Use and Health were used to produce average annualized data on driving under the influence of alcohol or illicit drugs in the past year for each State based on self reports by adults aged 18 or older.

* Based on the combined 2004 to 2006 National Surveys on Drug Use and Health data from current drivers aged 18 or older, 15.1% had driven under the influence of alcohol during the past year and 4.7% had driven under the influence of illicit drugs.

* States with the highest rates of driving under the influence of alcohol in the past year among adults aged 18 or older were Wisconsin (26.4%), North Dakota (24.9%), Minnesota (23.5%), Nebraska (22.9%), and South Dakota (21.6%)."