Year	% of lower secondary school age
1981	26.176549911499
1982	26.8150997161865
1983	23.0024890899658
1984	27.578519821167
1985	24.9521598815918
1986	26.2037906646729
1987	24.740909576416
1988	23.9354400634766
1989	25.5283603668213
1990	25.5423202514648
1991	24.8004703521729
1992	25.1024894714355
1993	25.3332195281982
1994	25.7907695770264
1995	24.7450199127197
1996	24.6716403961182
1997	24.6273403167725
1998	24.3198509216309
1999	23.3143005371094
2000	23.7684803009033
2001	23.0542793273926
2002	21.8292903900146
2003	21.5902900695801
2004	20.5007705688477
2005	19.787389755249
2006	19.5790996551514
2007	19.0748195648193
2008	18.3812808990479
2009	18.3323593139648
2010	18.22896
2011	17.6642
2012	17.40984
2013	17.19107
2014	17.06506
2015	17.49139
2016	17.66574
2017	17.45878