Yes the increase is a large
number of people but remember that the religion makes it a moral duty to entrap
your offspring by early baptism compounded by avoidance of university education
which would reveal Watchtower fallacies.
The world average birth rate
in four years will be a 1% annual population increase but Africa will grow to become 54%
of the world’s population by 2050. I guess that the birth rate for JWs, weighted
for a large African contingent, would be around 2.25% but perhaps more. Eight and one third million
JWs would therefore make for a natural “born-in” increase then of between 175,000 to
200,000 just from insider population growth which broadly leaves 100,000 new
converts many of whom will be relatives of insiders.
Of this second group (the
converts) most will come from Africa where deism is universal and belonging to
a religion, whatever stripe it is, is what you feel obliged to do. Further, endemic
poverty and corruption in the political system in central Africa make any religious
membership an attractive opportunity to join a community which teaches a hope of
deliverance from worldly woes.
In the Western World Japan is leading the way showing membership stagnation from three sources: the deaths from the high average age of the JW population there, families leaving en bloc and general loss of appetite for the merits of doomsday cults.