tom604, definitely burst, but I welcome facts. So, thanks.
Cars I took from ABS website, maybe I shouldn't do stats after midnight. It seems very high though. Anyway, firearms I went by what I've read. Which is interesting. I tend to keep myself up to date with this stuff, so I am actually amazed how much of this is not reported. And that brings us to my original statement that it's nothing - with your numbers, yep, still nothing.
Regarding whole of Australia vs gun owners only. I disagree. An incident can (and as break up of incidents shows) and often does involve multiple other non-gun-owner third-party, so I would still go with the population... also, why are we looking at accidents and hospitalisations? I am interested in unintentional deaths.
Looking at http://www.gunpolicy.org/firearms/region/australia - I have no mental capacity to work with numbers after midnight, as it has been shown, but skimming through actual deaths, it seems to me we are well below 0.9. In any case, 0.9, really... Not news.
As a side note, check out deaths from random falls. Stairs and gravity, the real killer.