"Alcohol-impaired driving fatalities declined 20% from 13,491 to 10,839 from 2006 to 2009, the most recent year for which fatality data are available (7). However, the proportion of all motor vehicle fatalities that involve at least one alcohol-impaired driver has remained stable at about 33%, because non-alcohol-impaired driving fatalities have declined at the same rate as alcohol-impaired fatalities (7). This study indicated that alcohol-impaired driving rates remain disproportionally high among young men, binge drinkers, persons who do not always wear a seatbelt, and persons living in the Midwest."
"Vital Signs: Alcohol-Impaired Driving Among Adults — United States, 2010," Morbidity and Mortality Weekly Report (Atlanta, GA: Centers for Disease Control and Prevention, October 7, 2011) Vol. 60, No. 39, p. 1352.