A couple months ago I went to a college party at a house I lived in while in college. During the parties back then, at least 50% of the people were smoking, at this party, with at least 100 people, not a single person was smoking, not even outside on the patio.
During the WWII era, 90% of the population smoked cigarettes. Most American Presidents smoke up until the 70s when tobacco ads wer outlawed on tv.