Dear Sergei, you can find some data for example in this report - http://www.internationaltransportforum.org/Pub/pdf/06YoungDrivers.pdf - chapter 1.3. I hope it helps.
The Fatal Accident Reporting System (FARS) has extensive data for all fatal crashes in US. You would need to make an assumption of driving period based on driver age. Legal driving ages vary state to state, but there is a graduated drivers license (GLD) site that maintains all of that legislative info. NHTSA also publishes a traffic safety fact sheet on young drivers https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=nhtsa%20traffic%20safety%20facts%20young%20drivers%202013