And another thing ....
Was just thinking about the reliability of aviation statistics and the following scenario came to mind. All the figures are just made up.
Say, the big fella in the sky has decided that, at an aerodrome with 100,000 movements per year, the law of averages will dictate that there are 3 MACs per year.
Now, say, in the country of Gamaria, there is not a large spread of flying activity outside of such aerodromes. Therefore the percentage of MACs per year would be artificially higher than say, in a country with the same number of aircraft and flying hours ... but with a much wider spread of aviation activity outside such aerodromes.
Could we substitute Australia and the USA in this scenario?
My point is that if we are to compare safety records ... comparing events per aircraft or flying hour is not necessarily a valid technique ... without taking into account many other significant factors.