Year	% of lower secondary school age
1998	28.847469329834
1999	28.9122505187988
2000	28.1445293426514
2001	27.5574607849121
2002	26.1728000640869
2003	24.1147899627686
2004	23.1089897155762
2005	22.4193706512451
2006	22.0259094238281
2007	21.1035709381104
2008	20.6617393493652
2009	20.2795791625977
2010	19.44873
2011	19.11718
2012	18.54335
2013	18.44031
2014	18.48981
2015	17.64697
2016	17.35421
2017	17.18322
2018	17.1466