[SampleMan]

I used the straight wiki data, but obviously the bibliography for that is listed.

Just search “Murder rates by country” and “Firearm ownership by country.

[marktwain]

The numbers I have seen show that the Australian murder rate was going down and has continued to do so, though in a very small amount.

http://www.aic.gov.au/statistics/homicide.html

There is a fair amount of fluctuation due to the relaively low numbers (about 250-300) per year.