Year	% of lower secondary school age
1971	10.6514501571655
1972	9.83428001403809
1973	10.4134302139282
1974	10.340160369873
1975	10.2848901748657
1976	15.6469297409058
1977	11.6807403564453
1978	10.3999795913696
1979	10.4093904495239
1980	10.3410396575928
1981	11.6269102096558
1982	10.0316095352173
1983	11.3282098770142
1984	11.2165498733521
1985	10.5398101806641
1986	11.4323902130127
1987	8.7306604385376
1988	9.09160995483398
1989	11.2099103927612
1990	11.2481803894043
1991	11.4311399459839
1992	11.2776899337769
1993	11.0422096252441
1994	12.024299621582
1995	12.2518997192383
1996	12.4816904067993
1997	12.7263498306274
1998	12.7140398025513
1999	11.7089996337891
2000	12.394359588623
2001	13.2834396362305
2002	13.2852697372437
2003	12.5608797073364
2004	10.0645503997803
2005	10.1554098129272
2006	10.7490901947021
2007	11.2790298461914
2008	11.4051704406738
2009	11.8967599868774
2010	11.86484
2011	11.4391
2012	11.64269
2013	13.73248
2014	12.60175
2015	13.63342
2016	14.17525
2017	14.6118
2018	13.51108