I guy I know was giving a public talk a couple years ago and spent quite a few minutes relating how he took the time to go thru yearbook statistics and the current numbers to show adding up the published numbers should mean there are many more active JWs. But that obviously wasn't the case. He related some DF stories but said there should still be many more witnesses and asked rhetoricly "where do they all go?" Sort of like he really was at a loss.
Yea JW efforts to increase numbers has been a huge failure