roubaixtuesday
self serving virtue signaller
I could be wrong but that looks like car driver casualties. It would be expected unfortunately that more older drivers are the victim of their own mistake and more vulnerable in a collision. But more younger drivers manage to walk away from a collision which takes others lives (that may also involve hitting an elderly driver, yet adding more to that graph to mislead).
We could all speculate about statistics we don't fully understand all the detail of.
I think the effect is so large, however, that it clearly shows there is a real issue with older drivers causing disproportionate hazard.