Cobweb: I seem to recollect seeing on one of slim's collapse threads some demographic data showing jw members by age range.
That may have been from one of the threads that I started:
Basically, the demographics show that the number of people who call themselves JWs in Australia has started to decrease by nearly 1% a year, and that decrease will get bigger. Given that other aspects of the data seem to match the US Pew survey, I think it is a safe bet to say that what is happening in Aust, is happening throughout the the West.
At this stage, you would have to project that in somewhere around 30 to 50 years, the religion in Aust will be about half the size. If you find that hard to believe, go back and read the charts.
Of course, most of this data is historical. In recent times, the perception of Watchtower has become a lot worse, congregations have merged, Kingdom Halls sold, etc. These are separate factors that are too recent to be a significant factor in the data. It is possible, even probable, that these factors, and the others listed by SBF, will accelerate the decline.
I see decline becoming more and more obvious in the coming years. It will be interesting to see how JWs rationalize it.