Here is some waitlist data from the last 4 years. Getting off the waitlist depends upon how many accepted applicants enroll by May 1.
2017
Number of qualified applicants offered a place on waiting list: 10,378
Number accepting a place on the waiting list: 6,038
Number of wait-listed students admitted: 2,236
Is your waiting list ranked? No
2016
Number of qualified applicants offered a place on waiting list: 9,983
Number accepting a place on the waiting list: 5,707
Number of wait-listed students admitted: 4,097
Waitlist not used 2014 and 2015.