Staplin and Lyles (1991) analyzed 1986- Variation by age, sex, and crash severity was not statistically significant (all P > 0.20). Source: U.S. Department of Transportation, National Highway Traffic Safety Administration. In 2003, about 1 in 7 licensed drivers was 65 or older. Losing two . !function(){"use strict";window.addEventListener("message",(function(e){if(void 0!==e.data["datawrapper-height"]){var t=document.querySelectorAll("iframe");for(var a in e.data["datawrapper-height"])for(var r=0;r