safety first !!!

784 moto/vehicle/cyclists died on US roads in 2005. 92% of them died in crashes with other motor vehicles (720).
About 540,000 moto/vehicle/cyclists visit emergency rooms with injuries every year. Of those, about 67,000 have head injuries, and 27,000 have injuries serious enough to be hospitalized.
Bicycle crashes and injuries are under-reported, since the majority are not serious enough for emergency room visits.
1 in 8 of the moto/vehicle/cyclists with reported injuries has a brain injury.
Two-thirds of the deaths here are from traumatic brain injury.
A very high percentage of moto/vehicle/cyclists' brain injuries can be prevented by a helmet, estimated at anywhere from 45 to 88 per cent.
Many years of potential life are lost because about half of the deaths are children under 15 years old.
Direct costs of moto/vehicle/cyclists' injuries due to not using helmets are estimated at $81 million each year.
Indirect costs of moto/vehicle/cyclists' injuries due to not using helmets are estimated at $2.3 billion each year.