One in four teens has a serious accident within the first year of driving. General inexperience and a lot showing off to friends and over confidence.
i disagree because most of the time teens get into car accidents because of being inexperienced such as making unsafe lane changes and following too close a car.
The FARS database has some info like that for the US, grouped by age etc.
http://www-nrd.nhtsa.dot.gov/Pubs/811744... website has stats from the DOT