Year	% of lower secondary school age
1975	5.26272010803223
1976	5.78781986236572
1977	4.80881977081299
1978	4.67671012878418
1979	4.47134017944336
1980	4.14432001113892
1981	4.30713987350464
1982	4.1242299079895
1983	4.01281023025513
1984	3.98995995521545
1985	3.97768998146057
1986	4.42355012893677
1987	4.00918006896973
1988	4.0298900604248
1989	4.0591402053833
1990	4.15915012359619
1991	4.09351015090942
1992	4.2185001373291
1993	4.20637989044189
1994	3.62631011009216
1995	3.58947992324829
1996	3.80054998397827
1997	3.79357004165649
1998	3.5309898853302
1999	3.5734601020813
2000	3.40067005157471
2001	3.47669005393982
2002	3.08722996711731
2003	2.7601900100708
2004	2.41386008262634
2005	1.54963004589081
2006	1.7364399433136
2007	2.6100800037384
2008	2.84538006782532
2009	2.75762009620667
2010	2.84861
2011	3.46449
2012	3.91034
2013	3.53984
2014	3.58939
2015	3.22305
2016	3.04609
2017	2.69824
2018	2.68389