Vaping better than nicotine replacement therapy for stopping smoking

Yes vaping results in more people stopping than the patch or gum but...

How many people that quit smoking by vaping still vape, compared to people that quit using gum or patches and still use those.

The point I'm trying to make is along the lines of "Many people could successfully quit snorting cocain by smoking crack" Vaping allows for the user to deliver a stronger, more pure form of the drug nicotine. It would be nice to see these numbers.