Data compiled by the Insurance Institute for Highway Safety shows more US drivers and passengers are killed on July 4 than any other day of the year. In the U.S., car crashes are the number one cause of death for everyone ages 1-34, with teens crashing four times more often than any other age group. Based on the latest available data, IIHS reports that more than 670 people were killed on July 4 from 2007-2011, which equates to an average of 134 deaths on that day each year.

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