[seadan83]

The kicker is rate of head injuries during a bicycle crash. A fraction of crashes involve a person's head (though when it does, for those one in ten falls, you really want it)

The numbers are under reported. Every cyclist I know that uses a bike for transport has been hit by a car. Myself thrice, never reported. Crashes involving myself, never reported. Hence, there is a bias in the data for the really traumatic injuries