 Nearly 55 % of the admitted students come from public high schools , while 45 % come from private schools . By 2007 , the student population was predominantly middle @-@ lower and lower class with 42 % and 35 % from each background respectively . 42 % of the students are between 19 and 22 years of age , 25 % between 23 and 25 years , and 17 % between 15 and 18 years . Each year about 2 @,@ 300 undergraduate and 600 postgraduate students graduate from the university . 
