Year	% of official school-age population
1999	68.41868
2000	67.33038
2001	66.91463
2002	66.32346
2003	66.06144
2004	65.73316
2005	66.13248
2006	67.93115
2007	68.48878
2008	69.33235
2009	69.87238
2010	68.71515
2011	68.63643
2012	68.20262
2013	68.56847
2014	69.06819
2015	69.45775
2016	69.94244
2017	68.74108
2018	67.90176