The National Highway Traffic Safety Administration (NHTSA) has released the following seat belt statistics(in 2003):
In 2002, 42,850 people died in traffic accidents. Of that number, 19,103 were not wearing seat belts.
4,200 lives could be saved each year if 90% of the U.S. population wore seat belts.
Fatalities and accidents involving those not wearing seat belts costs the U.S. approximately $20 billion per year. Of that cost, 74% of the tab is paid for by the public.
One out of four Americans still doesn't wear a seat belt.
View this public awareness video about wearing seat belts
I could not find the source to mention here but in other related story I read that seat belts are increasing the risk of driving recklessly which inturn is increasing the rate of accidents..