There's a graphic floating around that show cigarette consumption in the U.S. It goes up and up until about 1950 or so then it starts to go down and down. I a

There's a graphic floating around that show cigarette consumption in the U.S. It goes up and up until about 1950 or so then it starts to go down and down. I always wonder about that. I mean, I understand that there were laws and taxes and reports about smoking. Looking at that chart though it doesn't look like that. It looks like everyone went - "You know, I don't want to smoke anymore and I don't want to be around smokers" - and then just slowly gave it up over 30 or 40 years. Was it the laws, taxes and reports? Or were all of those things just an expression of desire?