Do you mean those who were accepted outright? Or total eventually accepted, including off the waitlist? From reading last year's thread, the things I do know is it seems like things take a while, so don't give up hope, and there will be a lot of movement off their hold list, especially later in the season as people withdraw due to acceptances at other schools.
(Just curious what people generally mean when they ask this question. Is the difference negligible due to the nature of the process? e.g. once people start withdrawing, both off the acceptance list and the waitlist, are those who are left to get taken off the waitlist usually only people who definitely accept? Either way, I don't really have the stat offhand, but I imagine an estimate could be calculated at least from the responses to previous years' threads.)