All the older elders in hall came in between 1968 and 75 They are still there. On the average they had 3 kids and each one of them had children and most are still in. You get 50% of our congregation. So it's safe to say if you took out the big influx of the 1975 era. You would only have less than half million u.s. jw's
What would Watchtower be like now with out the 1975 fiasco.
Difficult to say, 1975 brought about one million to the WT and the majority stayed. My guess is that without 1975 we will have a smaller religion with a little better reputation.