Sorry, I totally forgot about this post, hadn't noticed your replies. - Edit 1
Before modification by Legolas at 31/07/2012 08:32:45 PM
Some folks have been revising that like crazy the last few days, I just spent like twenty minutes trying to find the page again thinking I had the wrong ones until I did 'view history' and picked the version from when I wrote that. Christ was that aggravating. I was busy writing a cop-out about being unable to find it when I thought about revisions. Anyway I make no claims to its accuracy or anything else, I found it, pasted it into excel, sorted it by year and clipped off all stuff before I was born, removed all that weren't from the US or general EU, and counted.
I have no idea why that list includes some incidents while omitting others - most notably of course, the Tucson shooting that very nearly killed Gabby Giffords. Or the Jonesboro school massacre. If you look at the link below you'll find 44 massacres in the US since 1980, and that list too is missing some that do appear on others, like the Oikos thing this year. I haven't checked if all those massacres happened with guns, admittedly, but odds are the vast majority did.
I don't even necessarily know if the US has much more of these things per capita than other countries, either. I was just baffled by your very low number, and my quick and lazy searching seems to confirm it should be rather more.