I agree with Dick in part, not because of relative population, but in regard to relative Aviating population. The number of active pilots at all levels in the USA, the amount and density of traffic and airports, military airspace, weather phenomenon, elevation, and so on is far above Australias pitiful aviation scene. Australia should have an accident rate 1/10th that of the USA, but it does not. I do blame in part the rule set and abomination of what is Australias regulator and government decisions in relation to Aviation infrastructure. Safe skies are empty skies as far as Australia is concerned.