So let's look at the figures:
19.2% have tried or purchased e-cigs.
Of those 19.2%, 15.8% had never smoked conventional cigarettes.
Therefore, 3.0336% of the sample had never smoked but had tried or purchased e-cigs.
And the crucial bit:
"Other experts, however, cautioned against jumping to conclusions, particularly since the study did not follow up to see whether children continued to use e-cigarettes after experimenting with initial puffs."