During 2008–2010, a total of 14,283 motorcyclists were killed in crashes, among whom 6,057 (42%) were not wearing a helmet. In the 20 states with a universal helmet law, 739 (12%) fatally injured motorcyclists were not wearing a helmet, compared with 4,814 motorcyclists (64%) in the 27 states with partial helmet laws and 504 (79%) motorcyclists in the three states without a helmet law

via Helmet Use Among Motorcyclists Who Died in Crashes and Economic Cost Savings Associated With State Motorcycle Helmet Laws — United States, 2008–2010.