PERCENT OF ALCOHOL-IMPAIRED DRIVERS IN FATAL CRASHES BY AGE, 1999 AND 2008 (1)
Age 1999 2008 Point change
Under 16 10% 10% 0
16 to 20 17 17 0
21 to 24 31 34 3 pts.
25 to 34 28 31 3
35 to 44 25 25 0
45 to 54 17 21 4
55 to 64 11 12 1
65 to 74 7 7 0
Over 74 4 4 0

(1) Alcohol-impaired driving crashes are crashes that involve at least one driver or a motorcycle operator with a blood alcohol concentration (BAC) of 0.08 percent or above, the legal definition of drunk driving.

Source: U.S. Department of Transportation, National Highway Traffic Safety Administration.