I keep thinking -
How is it that the numbers keep growing in the US, and the west in general, if supposedly at least half of all JWs raised in da twoof here leave it at some point, and also given that JWs generally aren't big baby makers? Spanish language congregations account for some of it, for sure, but those alone couldn't possibly be enough to offset the low retention rate.
Then it occurred to me. This is just speculation and guesswork, but it would seem to me that the age distribution among JWs probably isn't the same as the general population, due to the late-60s/early 70s influx. So what you have in the USA is a mass of baby-boomer aged JWs, and their kids (the ones who stuck with it anyway) and grandkids, so you have three generations of Jaydubs attending kingdoom hells in the USA, plus the 80s converts and their kids (a sort of echo effect), that are all there mostly because of the mentioned late 60s/early 70s spike.
I would speculate that if you were to compare the age distribution of the population of the USA as a whole vs. that of JWs, you would find that boomer-aged JWs make up a significantly higher percentage of JWs as a whole than the same group in respect to the general population. At the same time I would also speculate that there are relatively fewer JWs in their 70s and 80s than those in the same age range in the gen pop, because the ones in this age range would (mostly) have come in prior to the spike.
So i say, JWism in the white west dies with the boomers, the ones who enthusiastically embraced JWism in the heady days of the early 70s, and held on for decades after, and who keep holding on, who are now in their 60s and silently wondering just WHEN THE HELL ARMAGEDDON IS GONNA GET HERE??