Year	% of lower secondary school age
1975	49.1161918640137
1976	48.1850700378418
1977	45.3959999084473
1978	41.2097587585449
1979	34.7059516906738
1980	31.4878902435303
1981	30.7003002166748
1985	33.3533592224121
1987	36.4158401489258
1988	38.9274711608887
1989	38.6810302734375
1993	40.4484214782715
1999	51.7703094482422
2000	48.5279197692871
2003	44.060131072998
2004	41.1197509765625
2007	33.463981628418