Below is the list of candidate that will be writing post-utme in various Nigerian universities.

uniilorin-77,169
uniben-30,880
unilag-33,007
uniport-22,434

see the number of candidates that will be sitting for post-utme in other Nigerian universities and see the number of candidates you will be competing with in the post-utme here
http://myschool.com.ng/school/news/36198/jamb-performance-index-2015-number-of-candidates-for-post-utme-in-various-universities.html