au ca ▁and ▁N ari ño ▁come ▁in ▁second ▁and ▁third ▁in ▁terms ▁of ▁student ▁representation ▁in ▁the ▁school , ▁with ▁approximately ▁ 5 % ▁and ▁ 2 % ▁respectively . ▁ ▁Near ly ▁ 5 5 % ▁of ▁the ▁admitted ▁students ▁come ▁from ▁public ▁high ▁schools , ▁while ▁ 4 5 % ▁come ▁from ▁private ▁schools . ▁ ▁By ▁ 2 0 0 7 , ▁the ▁student ▁population ▁was ▁pre domin antly ▁middle - lower ▁and ▁lower ▁class ▁with ▁ 4 2 % ▁and ▁ 3 5 % ▁from ▁each ▁background ▁respectively . ▁ 4 2 % ▁of ▁the ▁students ▁are ▁between ▁ 1 9 ▁and ▁ 2 2 ▁years ▁of ▁age , ▁ 2 5 % ▁between ▁ 2 3 ▁and ▁ 2 5 ▁years , ▁and ▁ 1 7 % ▁between ▁ 1 5 ▁and ▁ 1 8 ▁years . ▁ ▁Each ▁year ▁about ▁ 2 , 3 0 0 ▁under grad uate ▁and ▁ 6 0 0 ▁post grad uate ▁students ▁gradu ate ▁from ▁the ▁university . ▁ ▁Each ▁year , ▁an ▁average ▁of ▁ 1 , 2 6 3 ▁University ▁of ▁Valle ▁students ▁take ▁the ▁Ex amin ations ▁for ▁High er ▁Education ▁Qu ality ▁( , ▁E CA ES ). ▁The ▁test , ▁carried ▁out ▁by ▁the ▁I CF ES , ▁evalu ates ▁the ▁general ▁and ▁specific ▁compet encies ▁of ▁final ▁year ▁students ▁from ▁ 2 7 ▁under grad uate ▁subjects . ▁Every ▁year ▁an ▁average ▁of ▁ 5 3 % ▁of ▁the ▁test ▁tak ers ▁from ▁the