most effective use of the finite risk mitigation resources to mitigate the subtstantial risks.
From that it seems that worldwide, 61% of commercial aircraft accidents occur during first or last stages of a flight, so there's a reasonable chance that if it happens, it'll happen at an aerodrome (where the firies are).
From a 2008 CSIRO paper 'Decision Support for Risk Assessment of Mid-air Collisions via Population-based Measures"
Excerpt from Table 5
Individual risk for mid-air collisions in Australia - (1961-2004)
National Individual Risk due to the (entire) air transport sector
7.8 x 10-8
That's 0.000000078 chance of you being involved in a mid air in Australia while engaged in any form of civil aviation (admittedly fairly old data).
Now we all know that there are a lot more accidents due other causes than mid airs, so I would say the the money
is going where the substantial risk is.
Anyway, this is taking this way off thread.