I've often wondered if there are now more of "us" than "them" who are left in. If you could the "active in body only -- meaning out mentally" in our group, then I think there is no longer any doubt about it. The JW membership is hemorrhaging. That's why the RC is all about loyalty to GOD -- the "Guardians Of Doctrine".
I've gone back an given consideration to all of my peers when I was a young JW. Most are "out". Then I looked at all of the peers of my children while they were young. The vast majority of them are all "out", too.
However, many who are "out" because of being DFd, are still "believers". They just can't live up to the JW rules, but they wish they could.