Interesting - 2015 was a really bad year, then things started improving.
Wasn't 2015 when they started JW Broadcasting?
For all the criticism it (rightfully) gets, it does seem to have at least contributed to the rebound.
Oh, and others have noted dozens if not hundreds of times on other threads - it is probably misleading to contrast "number baptized" vs. "publisher growth". There are many hundreds of thousands of "unbaptized publishers", and probably a significant portion of them never progress to baptism (mainly bored teenaged kids of JWs just counting the days until they can leave).
And even ignoring that, keep in mind that the "deficit" includes people leaving in any form - disfellowshipping, fading, and death.