The rest of the story is that new data from the CDC itself show that the smoking rate among U.S. high school students dropped significantly in 2013, reaching the (the Youth Risk Behavior Survey), which began in 1991.

(See: Lechner et al. Effects of duration of electronic cigarette use. Nicotine and Tobacco Research. Published online May 13, 2014. doi: 10.1093/ntr/ntu061.)

Furthermore, later in the paper they reinforce this point more specifically, writing: "the cross-sectional nature of our study does not allow us to identify whether most youths are initiating smoking with conventional cigarettes and then moving on to (usually dual use of) e-cigarettes or vice versa...".

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