How soon do med schools fill their classes?

<p>Not sure if anyone will know, and the schools won't tell, but here goes. Noticed that almost all med schools have rolling admissions; also noticed that all med schools require interviews. Apparently, the schools interview through the year, but it seems at some point they've filled their class and still interviewing.
So..at what point is the class filled-except for the very few waitlist spots that may or may not open-and the candidate is only interviewing for the waitlist?</p>