I remember that the 10 cents with the fish and all the animals (67) are 55% if everything 68 is 50% (damn canada made it hard to follow) Everything under 67 is 80%. Correct me if I'm wrong. Nice stash by the way!
PS: I've asked you for your oldest coin, which is a 1913, I've found a 1907 10 cents. I'll try to take a picture and upload it!
Some of the 67's are 80%, 50% and 55%,which coin shops consider 50%. And some of the 68's are actually 0%! I can usually tell the difference by the patina and feel for the 1968's, but without testing, I just assume the 67's are all 50% when I buy them, just to be safe.