Xinhuan, I'm sure I could if I wanted to put enough time into it. This one was easy to find.. All one reliable source (US census).

I've started trying to look up country by country comparisons before, but decided it wasn't really worth my time for a couple reasons:

1 - Almost all the sites I could find seemed to be trying to prove either an anti-gun or pro-gun point, and seemed - to me at least - to be manipulating the numbers to suit their desires, and...

2 - As others have mentioned already, there are so many other factors that influence crime rates, that I just don't know if you could ever prove anything, one way or the other. Japan has strict gun laws and low crime rates, Rwanda had strict gun laws and absolute horror. One study will show Australia's crime rates increased after the government gun buyback, another will seem to show exactly the opposite.

For me, as I've mentioned in the other threads about this recently, it comes down to privately held guns being the last defense against tyranny. I know that sounds crazy to a lot of people, but I don't care. History has shown a repeating cycle of governments becoming tyrannical, and a significant number of those have disarmed the general public first (even before guns existed)