I did try a search before posting this question and found nothing current.
Pew Research -2016 says approximately two thirds of those born into the religion in the United States alone, no longer consider themselves as members. (Sorry, still don't know how to link, but it's an easy Google search.)
I don't know how accurate that is but at least it's an indicator.
When I left around a year ago I actually thought it was a very small number. Of course that was based on yet another lie from the WTS. They frequently claim that most who leave come back. Ha! I know that some do, but hmm, no, far from most. 😒
Does anyone have any information about this?