The Increase in Lives Saved, Injuries Prevented, and Cost Savings If Seat Belt Use Rose
http://www-nrd.nhtsa.dot.gov/Pubs/811140.PDF
Estimates that an additional 1600 lives would have been saved and 40,000 nonfatal injuries would have been prevented if 38 states and the District of Columbia, all with seat belt use below 90% in 2007, had been able to raise their level to 90%. From the National Highway Traffic Safety Administration.
