previously, they had to admit 27 people from the waitlist. That implies that last year, of the intended class size of 1966 which they admitted, approximately 1.37% refused.

this year, they had to promote 41 of the waitlist people to a class of 1974, which means that likely more people refused admission. That means the number went up, so YES

This looks like the rate went up to me

That link and screenshot don't show the "admission refusal rate."

@xyz I interpret it as the rate 27/1966, i.e. after the initial acceptance letters go out, what percent of those people end up not attending, so that there is later space on the waiting list.