The statistics probably reflect that Americans tend to drive more miles and for longer periods, said Dr. Guohua Li. "The more you're on the road, the more you're exposed to the potential for a crash," agreed Erin Sauber-Schatz, lead author of the CDC report. U.S. drivers also more often speed, drive drunk and take other risks, Li said. The U.S. toll went up last year to 35,200, as drivers racked up more miles behind the wheel as a result of an improved economy and lower gas prices.
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