Yes but cancer education and the costs of smoking are more recent.

Now smoking is shown as a very deadly habit and many commericials (mostly from philip morris and their new requirements) on quiting and destruction caused by cigs.

Ever seen a Canadian cigarette label? "THESE THINGS WILL KILL YOU AND GIVE YOUR CHILDREN FEET FOR EARS". I don't think the cancer education is working. If anything, advances in treatment (which probably don't do much for lung cancer) are probably dulling the effect you're talking about.

I don't know about that ,but there are so many laws where I live in the U.S. preventing smoking such as: close to buildings, in restaurants, in many bars, within 200 ft of health based buildings (hospitals and the like), at parks/public places I hardly ever meet someone who smokes and that reduces the amount of teens smoking as well. In high school very few teens smoked cigarettes it seems to have moved to pharmaceuticals and the like which are cheaper and easier obtained.

I think it might be more due to the younger generation(s) being the first to see a large number of older smokers live long enough en masse to get lung cancer.