I thought it would be best to vote on these before I post the results. I want people to chose the system for the system itself, and not the results it produced. I'll run this year's results through each of them and give those results later.
The systems up through 1994 used an averaging system: all points divided by # of tournaments, minimum divisor of 12. The 1997 system just added all the points. The 1998 system capped the results at the best 18. This year's system capped them at the best 17. Here are the round and quality points, in chart form:<br /><pre><br /> Round Points
Arne, there were two differences.<br />First, the round points at the top were tweaked. Slams and tour championships gave a bit more, while the Lipton was aligned with the other Tier I's.
Second, the biggest difference, is in the "slam multiplier" line for quality points. In 1993, you got the same points for beating a player at every tournament. In 1994, you got 1.5X for beating them at a slam.