I`m inclined to believe their are a lot more than we give credit for and probably more so among young males than females though I could be totally wrong about that ratio.
Whether they are aware of it or not a vast number are " in" simply and only because of emotional blackmail used against them .
"If you leave JW`s you will lose all family and friends who remain JW`s and will be shunned and ostracized"
Hence they stay "in" but are not believers anymore.
I think it`s a good post Phizzy