Albert King calculated that vehicle safety improvements that have come about as a result of cadaver research have saved an estimated 8,500 lives each year since 1987. For every cadaver that rode the crash sleds to test three-point seat belts, 61 lives per year have been saved. For every cadaver that took an air bag in the face, 147 people per year survive otherwise fatal head-ons. For every corpse whose head has hammered a windshield, 68 lives per year are saved.