@Finn dAbuzz,
												I think it's about a decade.  
Given that Canada is somewhat more socially liberal than the U.S.,   I suspect married gays here have a better chance of 
staying married than most American couples. 
At the fringe of the same subject,  one of the things the Canadian government forgot to plan for when allowing same-sex marriage was same-sex divorce.   An A2k'rs relative was the judge who ruled on what was thought to be the world's first same sex divorce, which forced a change in the definition of spouse in Canada.