I'm really sorry but please stop pointing at our neighbours in the south. You have to understand, they have something what I would call "wild capitalism". But Canada has a lot of social programs which won't leave people desperate.
When you give me the statistics of firearm homocide rates, they are completely useless. You have to take into considiration much more in order to be able to make a more or less accurate statement about the effect of availability of guns on criminality or homocides. Just ask youself, how it that possible that the number of firearms in U.S. increases constantly but firearm homocide rate is the same as 30 years ago. Bureau of Justice Statistics Homicide Trends in the United States: Trends in homicides by weapon type table
(http://www.ojp.usdoj.gov/bjs/homicide/tables/weaponstab.htm - broken link)
I also think that limiting yourself only to firearm
homocide rate is not very represantative. Guns, among other things, help people to defend themselves. I already talked about how often Canadians resort to firearms for self-protection. Imagine all these people dead. People who died because they had no means to defend themselves will not be shown in your statistics of firearm homocide rate. Whereas if you look at the total homocide rate, you know how many people were killed in total. Anyway, here is the rate of homocides involving firearms in Canada.
Canadian Homicide Trends
(http://teapot.usask.ca/cdn-firearms/Gimbarzevsky/homicide.html - broken link)
Last graph, "RGtot - total homicide rate involving all firearms". It is not falling. Now take a look at these statistics: http://www.statcan.ca/francais/freepub/85-002-XIF/0060585-002-XIF.pdf (broken link) page 21, table 5. Homocide with a firearm from 1994 and onwards. There is no decrease. When you look at the statistics it is good to look at all the crimes, not just firearms deaths. The reason why is because they are all interrelated and interconnected.
There is a good study which looks at the different crimerates comparing U.S. with other countries like Canada which have very restrictive gun control laws.
In my opinion, relying on many studies, I would say that almost no country enjoyed crime rate decrease after adopting draconian gun laws. Actually, I don't know any such a case.