I don't know for sure the exact numbers but:
Mizzou (U of Missouri Columbia)
A little over 1000 girls started rush last fall
Quota was 65 and only 7 out of 14 made quota initially but everyone except I think 1 house snap bid/COB'd up to quota
So...that means that 910 girls went to at least one pref to make quota 65, but I have no clue how many girls from formal rush alone were places since COB girls don't have to go through formal rush.