I was quoting older statistics, back when they didn’t even require seat belts in cars! And I believe that in Germany, if the victim is not pronounced dead on the roadside, but dies in hospital, it does not count as a traffic death. Believe me, in 1970’s it was amazing how common accidents were on das Autobahn.
Sorry to correct you: you’re perfectly right with respect to the seventies and earlier, but since the early eighties, any traffic accident victim in Germany who dies within 30 days of a crash will officially be counted as a road fatality.
This “30-days-rule” is used nowadays by every single country I’m aware of, when assessing their number of traffic casualties.