Here are some numbers to chew on from a study by the CDC:
CDC study finds universal motorcycle helmet laws increase helmet use, save money
Annual cost savings in states with universal motorcycle helmet laws were nearly four times greater (per registered motorcycle) than in states without these comprehensive laws, according to a Morbidity and Mortality Weekly Report study released today by the Centers for Disease Control and Prevention. Universal helmet laws require that motorcycle riders and passengers wear a helmet every time they ride.
Full press release here:
http://www.cdc.gov/media/releases/20...ycle_laws.html