Since you asked, it's the percentage of fatalities per total fatalities: Non-fatal accident data is similar. This is just the US Census fatalities for licensed drivers from 1996: 20 to 24 years old 15.2% - 8,700 (5 years only - equivalent to 30.4% - 17,400 in comparison) 25 to 34 years old 22.6% - 13,000 35 to 44 years old 20.4% - 11,700 45 to 54 years old 12.4% - 7,100 55 to 64 years old 7.1% - 4,100 65 to 74 years old 5.2% - 3,000 75 years old and over 4.9% - 2,800 The at risk groups would be the ones that the percent of total fatalities exceeds the percent of total drivers. There is one group that clearly exceeds all others. The 16 to 24 year old group has 27.3% of the fatalities for 13.5% of the drivers. The numbers and percentages steadily decline with age. The older you are, the more safer/smarter/skilled you are. Or you are dead already.