I am fully confident that well over 1/2, maybe as much as 3/4, of the world have never so much as talked to a JW who "gave them a witness".
Meanwhile, that other 25-50% of the world's population gets 2,3,4, maybe 12 visits a year from marble-mouthed JW teens or glassy-eyed pioneers anxious to stand at their door and show them a video on a 5 inch screen.
It's really quite pathetic. JWs are so convinced that they are "fully accomplishing their ministry", and it really is a colossal failure.