Year	% of lower secondary school age
1998	23.0787506103516
1999	23.2518997192383
2000	22.526159286499
2001	21.96044921875
2002	20.4690799713135
2003	18.0231895446777
2004	16.7287101745605
2005	15.641770362854
2006	15.1947202682495
2007	13.8149700164795
2008	13.1161603927612
2009	12.7812004089355
2010	12.03485
2011	11.44607
2012	10.80877
2013	10.08698
2014	10.00977
2015	9.8027
2016	9.9289
2017	10.1378
2018	10.02884