Year	% of official school-age population
1998	34.68582
1999	34.83482
2000	36.13663
2001	37.25077
2002	41.54201
2003	42.68119
2004	44.00536
2005	46.04791
2006	49.0981
2007	51.42512
2008	54.05557
2009	53.6496
2010	53.84763
2011	56.03954
2012	56.27231
2013	56.47211
2014	56.62085
2015	56.25454
2016	56.24191
2017	55.78699
2018	55.57306