This is the number of criminal massacres that resulted in an immediate death of five or more people since 1980. Non terrorist and non .gov. I may have not gotten all but I think I got most. However I'm sure there are many in countries that we don't get much info out of. i.e. South America, Africa, Russia.
What the hell is up with Australia? They have like 18 million people and have WAY more per capita than anyone else.