Year	% of official school-age population
1998	39.50539
1999	39.9486
2000	41.32376
2001	42.72314
2002	47.6148
2003	48.51332
2004	49.32327
2005	50.78678
2006	52.91827
2007	54.50425
2008	56.18131
2009	56.78616
2010	57.61952
2011	58.89505
2012	58.90411
2013	59.0746
2014	59.33292
2015	59.10142
2016	59.31012
2017	58.92147
2018	58.51197