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NHTSA: In 2015 seat belt use in the United States ranged from 69.5 percent in New Hampshire to 97.3 percent in California and Georgia. Nineteen States, the District of Columbia, Puerto Rico, Guam, and Northern Mariana Islands achieved belt use rates of 90 percent or higher. These results are from probability-based observational surveys conducted by 50 States, the District of Columbia, and U.S. Territories