A very interesting study, and I would suggest one with some validity. Thanks for posting this.
I do disagree with one conclusion you reached:
The 2002 Service Year for the Witnesses should show an increase larger than the previous year but not by a large amount. 2003 will be an even better year yet with the highest increase they have seen in years, perhaps as much as 5%-6% or more world wide.I suspect your dates are off by a few years. I've predicted that 2002 and 2003 will see decreases, and for factors that JanH mentioned among others. The end of the twentieth century got many JWs excited, even if only on a subsconcious level. 9/11 has gotten them excited again. But now that we are firmly in the 21st-century, and now that it appears the post-9/11 world won't be as awful as some feared, the next couple of years will see the exodus of many long-timer JWs who were holding on until the last prophecy of the WTS failed (that the end would come during the 20th-century). As the excitement of Y2K and 9/11 dies out, and things are just as they ever were, and the WTS is still getting things wrong, and people are realizing they might die of old age after all, some will leave.
After that, say by the mid-point of this decade, your prediction will absolutely come true (unless negative publicity reaches a roaring crescendo) and there will be an upswing again with new converts who know nothing of the old promises.
I made this prediction four years ago. Unlike You Know's predictions, mine has come true exactly as I foresaw. JW psychology is easy to predict. You are finding a physical correlation to this physchology, something I never thought of, but you can see the macro trends and come up with a similar prediction.