Working backwards, the next three cycles are going to be more challenging, because I have little information about their organization.
Kasparov (ranked 1st in the world), Kamsky (7th), and Z.Polgar (Women's World Champion) declined to participate. Kramnik (2nd) declined on the grounds that Karpov's direct entry into the final was unacceptable.
but that was just the tip of the iceberg. Matching the list of qualified players with the players who eventually showed up for the tournament, then showing how they all qualified, will be a separate exercise.