Year	% of lower secondary school age
1972	24.7329292297363
1973	21.7105407714844
1974	20.7206802368164
1975	18.4929008483887
1976	18.955249786377
1977	17.1843109130859
1978	18.5969200134277
1979	16.8299407958984
1980	7.07287979125977
1982	6.55801010131836
1984	8.48643970489502
1985	8.16971969604492
1986	7.04878997802734
1987	5.09033012390137
1988	5.63791990280151
1989	5.61568021774292
1990	5.95792007446289
1991	5.63238000869751
1992	6.31056022644043
1994	7.87660980224609
1995	5.33014011383057
1996	7.70551013946533
1997	5.66606998443604
1998	4.57824993133545
1999	3.98321008682251
2000	4.21182012557983
2001	3.07293009757996
2002	2.21270990371704
2003	0.0874399989843369
2004	0.218030005693436
2006	0.0785399973392487
2007	2.11354994773865
2010	1.05830001831055
2013	3.58124995231628
2014	7.15788984298706
2015	4.92845010757446
2016	4.8373498916626
2017	3.72951006889343
2018	3.33427000045776
2019	2.3926100730896
2020	2.58032989501953
2021	1.57956004142761