Wasn't really my point. You were saying 15 guns/100 is still a lot of people owning guns. Of course American gun owners also own multiples guns. Why edit the [in Australia] bit in to the quote, just to refute it? The fact of the matter is at 90 guns per 100 people even if the average gun owner owns 3 guns that's still 30% of the population, if 5 guns that's still 18% of the population owning guns.
I didn't refute it, I was just clarifying for those who don't remember the whole quote...
My point is that 15/100 can be meaningfully compared in a direct linear fashion to 100/100, and multi-ownership has nothing to do with it.
Or if anything, multi-ownership happens more in America, thus making the gap between the two numbers SMALLER in terms of actual number of gun owners. I.e. inflating the number of actual owners in Australia and/or deflating the owners in America beyond what those ratios themselves imply.
So the 15 vs. 100 can be taken to be a meaningful measure of about 1/7 as many gun owners OR MORE if anything in Australia as in America. Which implies still a lot of gun owners. Plenty enough for gun laws to have a reasonably expected influence.
@Reelya
The law you quoted doesn't tell us about actual ownership... Without posting ratios of category 1 vs 2 license holders, what's that have to do with anything? It's just a legislative threshold, not a reflection of any real trends necessarily. There might be like 2 guys who hold a collector's license for all we know, etc. etc.
The licensing vs. just background check is a decent argument, but how much it affects things is unclear. If we assume that every gun owner wants to and can afford to own multiple guns "if only the law let me!! *shakes fist*" then it's a strong point. If that's not true, then it's a weak point.
So it may or may not counteract or overwhelm or undwhelm the basic statistical skew. Without more info, I'd probably guess that it just counteracts the statistics, and brings us right back to 15 being basically directly linearly comparable to 100.