Year	% of official school-age population
2006	63.29434
2007	64.1553
2008	64.19144
2009	64.26693
2010	64.28042
2011	65.33961
2012	65.55649
2013	66.0969
2014	66.77375
2015	67.98942
2016	69.00909
2017	68.75764
2018	68.80184