I'm a Canadian and I have moderate/severe acne which is thankfully being treated now by Accutane (sorry, holistic peeps, I bit the bullet and am trying it). I don't know if the rates of acne are higher in other countries but I certainly have friends and family who suffer from acne as well here in Canada. At my university lots of the students had it. Well, not "lots", but you wouldn't ever say that "No one but me has it". You could walk to class and see a few other people.
If people think that if its really more common in the US it may be because you just see it more. We have our medicare system where it is so much easier and cheaper to get treatment for people of all incomes. So that would be helpful. There may just be more people runnin' around with topicals in Canada, who knows.
And lets not get into a Canada vs US debate. Not all Canadians are looking to "pipe our dirty oil across your rivers and streams" and not all Americans eat like shit. Generalizations will just piss people off. I am interested if anyone has found any studies about the acne prevalence though between different countries.