The number of pupils was increasing until the school year 1997/98, when more than 100,000 pupils were enrolled in secondary schools. Then, however, the number of secondary school pupils began to decrease and in the school year 2013/14 it amounted to almost 77,000.
Število dijakov je naraščalo vse do leta 1997/98, ko jih je bilo vpisanih več kot 100.000, po tem letu se je začelo zmanjševati in v šolskem letu 2013/14 jih je bilo vpisanih približno 77.000.