The deaths per gun is relevant to the claim that murder rates are correlated, if not driven, by guns. If Canadians had the same prevelance of guns as the US, and the murder rate was a function of the number of guns, then the US would still have 11,000 gun deaths and Canada would have about 152. Conversely, we could reduce the number of US guns by a factor of eight for the same gun ownership rate as Venezuela, which is less than a fourth that of Switzerland and a third that of Sweden, yet Venezuela has 53 murders a day
, which for the US would be 220,000 a year. An eighth as many guns per capita, 20 times as many murders per capita.