Year	% of official school-age population
1999	69.4167
2003	67.25193
2004	66.73655
2005	67.21877
2006	68.8029
2007	69.20256
2008	70.14632
2009	70.85937
2010	69.45225
2011	69.28301
2012	68.68017
2013	68.95971
2014	69.65869
2015	69.75418
2016	70.18682
2017	68.69681
2018	67.77144