Year	% of official school-age population
1998	48.99872
1999	49.06892
2000	50.45197
2001	51.49781
2002	55.38768
2003	56.19608
2004	56.77387
2005	58.64566
2006	61.10156
2007	64.20342
2008	66.87364
2009	66.88559
2010	66.25755
2011	69.65508
2012	69.76417
2013	69.86162
2014	70.21091
2015	69.81717
2016	69.12548
2017	68.61543
2018	68.13771