Someone may have linked to this already, but the this interactive page in the Pew Religion Study is pretty interesting, especially when you look at the trends for JW between 2007 and 2014. Here's what it shows:
JWs are increasingly non-white. In fact, the percentage of white JWs has decreased from 2007 to 2014 by 12%, while Hispanic JWs have increased by 8%. and black JWs by 5%, Asians by 1%. IOW, almost half of all JWs were white in 2007 but by 2014, only a little more than a third were. This supports what many have observed--much of the increase is in foreign language, esp. Spanish.
JWs are increasingly poor. When you look at the trend from 2007-2014, the reason for the June JW broadcast money pitch becomes clear. While never well-off, even at the best of times, the number of JWs who make less than $30,000 has increased, while the number who make $50,000 and over has shrunk dramatically (from 35% to 26%). That means only about a quarter of JWs earn enough to be categorized as middle-class.
JWs are increasingly old. In 2007, 60% of JWs were under 50. In 2014, that percentage dropped to 49%.
JWs are increasingly female. In 2007, 60% of JWs were women; by 2014, 65% were women, meaning men make up a little more than a third!
These are dramatic changes in a space of only seven years, I think. If you extrapolate another seven years, you can see how the Borg might be in real trouble, especially if the GB are relying on "wealthy" American JWs to bankroll the worldwide work.