APA publishes them. I know, for this year, since I interviewed at both:
Loyola U: about 370 applicants, 14 slots for students entering as 1st year students, 1 slot for a MS student which makes a total class of 15 out of about 370 applicants.
GWU: about 300 applicants, interviewed about 50 (?), extend offers to 30 applicants.
Hope I got that right. Others, please chim in.