Some of those vapers would have been smokers. And the smoking rate for youth never got close to being below 5%.

Huff post says that in 2011 it was 16% for youth.

So if you know 20-30x vapers than smokers that's incredible evidence that vaping is reducing the number of smokers dramatically.

https://www.huffpost.com/entry/cigarette-smoking-decline_n_6...

For some historical context when I started college in mid 2000's 20-30% of the people I knew smoked.