I wear mine 50% of the time...
I grew up in a time when they weren't law.... although i dont doubt the safety rating...BUT my father in law would still be here with us here today if he had not been wearing his.... Car accident, car was pushed off a small bridge into a ravine..when the car landed, the seat and the weight of his body sitting on the buckle would not allow him to open the seat belt and he drowned. He had minor injuries as a result of the accident, official cause of death is drowning.
they need to make seat belts fit better!.. if the belt is cutting across my neck i wont wear it even in vehicles with the shoulder height adjustable sone still cut you right across the throat and not sit on your shoulder.