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Claim by @CDCTobaccoFree and others that movies cause teen smoking: 25 years of data not supportive http://tinyurl.com/y7jaydl8 . #HelpOscarQuit ?pic.twitter.com/3EMfMQLQbN
My interpretation of your graph is many different variables affect initiation, and youth seeing Celebs smoke in movies is just one. Fortunately there have been other variables driving 
smoking over the years, but maybe we’d be at even lower rates if not for movies highlighting.
Agree 100% that youth initiation is complex. Which is why "flavor" of the week claims: marketing, movies, flavors, JUUL and other products, are all sizzle and no (scientific) steak.
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-> Congress took cigarette commercials off tv 50 years ago but tobacco is still a presence in movies. During awards season studios go all out to promote some of the smokiest movies.