Year	% of official school-age population
1998	35.2646
1999	35.48827
2000	36.84047
2001	38.01486
2002	42.39448
2003	43.54256
2004	44.87653
2005	47.02825
2006	49.99836
2007	52.31069
2008	54.98178
2009	54.57251
2010	54.74684
2011	57.13637
2012	57.31144
2013	57.51832
2014	57.72896
2015	57.41943
2016	57.4027
2017	56.97464
2018	56.67763