When I was a teenager (early 1980s,) and I first started working in factories, I would say about 80% of the women that worked on my shift (of 60 women) smoked. As did 65% of my extended family members (about 25 people.) I would go to the pub two or three times a week in the 1980s and early 1990s, and about 70 to 80% of people smoked. Including me. Although I did give it up. I started at 17 and give up in my mid 20s. Some 30+ years ago.
My daughter is now in her late 20s and she has, and I'm not kidding you, about 22-23 friends ... from college, University, school, work, etc... Not one. I mean NOT ONE single one of those friends smoke. Neither does she or her fiancé. Her fiancé has approximately 15 extended family members. Only one of them smokes, and that's his nan, who's 79. In MY extended family I have now, now around 20 people, (on mine and DH's side,) NONE smoke. Not one.
In my street we have 21 properties. approximately 45-50 people in those 21 properties. I don't think more than three or four of them smoke again, they are 55 plus.
I think it's becoming increasingly unfashionable to smoke, as well as being extortionately expensive. I think it makes people look quite unclassy to be honest... It looked classy some 50+ years ago, but now, it makes people look quite unclassy. If I see anyone under 50 smoking now, I surmise that they are not very bright, and are intellectually challenged.