What is the incidence of mid-air collisions in the USA per 100,000 or per Million GA hours? Very small I suggest. I am guessing that we have double the rate of the USA.
Australia and the US had a similar rate of midair collisions involving general aviation aircraft during the period 1981-2003. The US had a higher rate of general aviation aircraft involved in collisions per flight hour away from the circuit area, which is consistent with the US having more general aviation flying activity and a higher traffic density
https://www.atsb.gov.au/media/36828/...midair_col.pdf