The answer is E, less than one percent.The total number of head injury fatalities in the US is
around 75,000 per year.[i](Estimates
vary, up to 115,000).The total
number of bicycling fatalities, from all
injuries, is only about 800.The
number of cyclists killed annually due to head injury is a maximum of 600,
probably much less.That's not
merely low; That's less than 1%!
[i].Data on fatalities from "Epidemiology of Head Injury," J.F.
Kraus, in Head Injury, Cooper, P.R.
ed., William & Wilkins, 1993.Cyclist
fatality data from NHTSA, www.nhtsa.dot.gov/.