Well, this is something that cannot be correctly predicted. No one can tell you the exact number till which the waiting list can get clear. If I can vaguely remember, last year the waiting list moved till 45, I am not sure though.
However, since the program is gaining more and more popularity with time, I am quite sure that this number will descend. If you are on the waiting list, I would suggest you keep your fingers crossed and hope for the best to happen.