Comparison:
http://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate_to_1999
Granted these studies are a decade old.
Let's compare two "relatively" similar countries in terms of homicide rate: Germany and Switzerland. Germany has a fairly involved background check and you must belong to a gun club and attend events to get a license. Switzerland, men are required to keep their military service rifle at home, so there is much higher ratio of armed households. Their homicide rate is close, but the firearms homicide number differs slightly. So if you are not shot, you are axed or stabbed in the rare event you are murdered. Neither society seems pre-disposed towards criminal violence in the first place yet there is a substantial difference in the ratio of armed households. Toss England in there and France, and the same sort of picture is portrayed. Similar levels of criminal violence but stark contrast in the number of guns.
All I am saying, and the tables here seem to re-inforce it, is that guns do not CAUSE criminal behavior, violence, and murder. If that is to be fixed, then the root cause needs to be addressed not the convenient thing that can be legislated: making guns illegal.