Thanks to graduated licensing programs, and the growing tendency of teenagers to delay driving, or even give up on it entirely, accident-related deaths appear to be less frequent:
and a recent article on SADD:
According to A new report by AAA , seven of the top 10 deadliest days of the year for car crashes for teenagers occur between Memorial and Labor Day. Five of the days fell in July:
http://wheels.blogs.nytimes.com/2011/06/06/aaa-teenagers-face-heightened-crash-risk-during-summer/