Interesting stuff. Thanks. It seems the biggest problem is that it isn't something being tracked with any kind of consistency or accuracy, which is what I suspected. I'm not sure it's something that's even possible to accurately track. Just showing someone you have a gun that deters them from committing a crime isn't likely to be reported, for example.
The agreement seems to be that it's still a lot less that using a gun as the aggressor, though. The stats on suicide by guns is pretty horrifying, too.
All up, I prefer living in a country with strong gun regulations and very few guns.
I'm more of a Count Duckula man.