My memory is that in the 70s Lagers and Pilsners were the biggest sellers but that Ales like Molson's Export and Labatts '50' were significant sellers. Molsons and Labatts both made Stouts as well, but they were not big sellers. In Saskatchewan, all of this would apply to bottle sales only, as we had 'pool' draft ( a unique Sask thing, I believe). I think ales may have outsold Lagers and Pilsners further east in Canadia.