Canadian percentages

Any Canadians out there care to answer this one? What's the percentage of copper cents to dumpers up there? The reason I ask is that I get a lot of Canadian cents mixed in with my bank loads here in northern Maine, and the overwhelming majority of them are keepers (I still separate them out into another pile). If that's the case up there, it seems like it would almost be practical to stockpile the coins without bothering to sort. Just sort of wondering out loud here...