I noticed that link shows the jump in fatality rate for older cyclists and pedestrians is bigger than the one for drivers. How much do your skills as a pedestrian really degrade as you get older? To me, this suggests that part of this increase in fatalities is due to the body weakening as we age. An average 30-year-old almost certainly has higher odds of surviving the same accident compared to a typical 75-year-old. Maybe looking at the fatality rate for 70+ year old automobile passengers versus passengers under 60 would be a good baseline to show this and allow us to better estimate the true danger of declining skill of a driver.