I think the problem with extrapolating from such limited data is that everything is guesswork, some of it seemingly likely, but there are so many factors that would affect fatality rates. Just off the top of my head are traffic density per mile traveled and length of average trip (driver fatigue).
That said, I think European drivers are better than Americans. I wish our lane discipline were as good - here, people drive whatever speed they want in whatever lane. That in itself causes a huge number of bottlenecks and accidents. The byzantine nature of driving laws, which differ from state to state, don't help either. In my state (New Hampshire), seat belts are not mandatory but hand-held devices are forbidden. But I commute to Massachusetts and as soon as I cross the state line, my seat belt has to be fastened (it already is, of course), but I can pick up my phone.
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