Here's a peer reviewed study
http://andrewleigh.org/pdf/GunBuyback_Panel.pdf
Using your data:
So the homicide rate in Australia went from 0.95 to 0.4 (58% lower) 1995-2006, and the suicide rate went from 5.25 to 3, (43% lower)
While in the US, it went from 11 to 10 for suicide (same period) and 7.4 to 5.7 homicide (23% reduction)
HOWEVER, your own home office's data:
http://www.aic.gov.au/dataTools/facts/vicViolentRate.htmlContradicts your source and yields the following
Year. Murder+ manslaughter
1995 2
2006 1.6
2013 1.4
(Manslaughter is 0.2 for all three points, so feel free to remove if you want to tweak)
That means a reduction (relative to 2005) of 20% by 2006, and 30% by 2013.
In the US, the homicide+negligent manslaughter rate was the following
https://ucr.fbi.gov/crime-in-the-u.s/2013/crime-in-the-u.s.-2013/tables/1tabledatadecoverviewpdf/table_1_crime_in_the_united_states_by_volume_and_rate_per_100000_inhabitants_1994-2013.xls1995 8.2
2006 5.7
2013 4.5
Or a reduction (relative to 1995) of 30.5% by 2006, and 45% by 2013.
So over the same time period, EVEN THOUGH Oz heavily restricted firearms, while the US not only added substantially to the inventory, but dramatically REDUCED firearm restrictions...our murder rate has fallen by more than yours.
Hell, even if you assume ALL murder in the US is firearm, the Oz firearm homicide rate went from 0.35 to 0.15 in 1995-2006, (55%) while ours dropped by 30.5%...(note, that the current stat for 2013 is basically the same as 2006, so we achieved 45% while you achieved 55-60%), meaning with basically COMPLETE OPPOSITE methods, the overall reductions were...comparable in terms of firearm deaths, and we actually did BETTER in terms of overall homicide deaths.
So while correlation doesn't imply causation, it IS required for causation.
So what this means is:
Interpersonal violence fell from 1995-2013 effectively across the entire developed world, regardless of firearm laws.
Violence fell by a greater degree in the US vs {Australia, the U.K. Etc, countries which went the "less guns route} even though we went the less restrictions and more guns route.
What this tells me is if you attribute -any- of the crime reduction to lower firearm ownership, you have no proverbial leg to stand on...at least statistically.
And...lawyered
<drops mic>