Year	% of lower secondary school age
1975	4.96696996688843
1976	6.27395009994507
1977	4.91654014587402
1978	4.81319999694824
1979	4.30261993408203
1980	4.03344011306763
1981	4.08622980117798
1982	3.82441997528076
1983	3.7522599697113
1984	3.69986009597778
1985	3.66530990600586
1986	4.28999996185303
1987	3.67229008674622
1988	3.78060007095337
1989	3.70774006843567
1990	3.84048008918762
1991	3.74138998985291
1992	3.95008993148804
1993	3.9655499458313
1994	3.42103004455566
1995	3.46357011795044
1996	3.9021201133728
1997	3.94813990592957
1998	3.76984000205994
1999	4.14963006973267
2000	3.83948993682861
2001	3.56052994728088
2002	3.17806005477905
2003	2.68505001068115
2004	2.41032004356384
2005	1.17110002040863
2006	1.23870003223419
2007	1.86281001567841
2008	2.16087007522583
2009	2.08354997634888
2010	2.31762
2011	3.13233
2012	3.40167
2013	3.50979
2014	3.69115
2015	3.42478
2016	3.22747
2017	2.87986
2018	2.86901