What proportion of occupants killed annually in passenger vehicle collisions are not restrained by safety belts?

Approximately half of the occupants killed annually in passenger vehicle collisions are not restrained by safety belts. According to data from the National Highway Traffic Safety Administration (NHTSA), unrestrained occupants are at a significantly higher risk of fatality in crashes compared to those who are buckled up. This highlights the critical importance of using seat belts to enhance safety and reduce fatalities on the road.