Number of vehicles on the road is not the same as miles/hours traveled.
America is much bigger country and people presumably drive much more than in Europe. So naturally vehicle deaths per 100K cars is higher in the US (because more time is spent at risk), irrespective of training/skill level.
America is much bigger country and people presumably drive much more than in Europe. So naturally vehicle deaths per 100K cars is higher in the US (because more time is spent at risk), irrespective of training/skill level.