I don't know why they even publish the correct numbers. Why not just give a bogus number that makes it look like everything is proceeding according to prophecy?
But how long can they continue to publish an artificial decrease? Those who were teenagers in 1935 are now around 90 years old...
I personally don't believe the Society is publishing the correct numbers even now. This is a liar organization, it's been proven again and again. I think the (artificial) increase is just a way for the Society to drop the 1935 heavenly calling cutoff doctrine. The "1935 generation" has been stretched about as thinly as the "1914 generation" was when they dumped that. By publishing an increase, the Society can point to it as "evidence" that the heavenly calling did not end in 1935 as previously thought:
*** w07 5/1 p. 31 Questions From Readers ***
as time has gone by, some Christians baptized after 1935 have had witness borne to them that they have the heavenly hope. (Romans 8:16, 17) Thus, it appears that we cannot set a specific date for when the calling of Christians to the heavenly hope ends.