Year	% of official school-age population
1998	39.07426
1999	39.33763
2000	41.09996
2001	42.65664
2002	48.44941
2003	49.75438
2004	50.30125
2005	52.81817
2006	56.13666
2007	58.83495
2008	62.47064
2009	62.07661
2010	61.65056
2011	64.75267
2012	64.98418
2013	65.38642
2014	66.0782
2015	65.52226
2016	64.75635
2017	64.32408
2018	63.88864