Year	% of official school-age population
1998	38.39373
1999	38.84911
2000	40.17831
2001	41.49774
2002	46.24788
2003	47.13059
2004	47.87372
2005	49.25448
2006	51.47905
2007	53.1101
2008	54.83642
2009	55.4221
2010	56.2644
2011	57.40716
2012	57.50509
2013	57.69805
2014	57.92412
2015	57.65109
2016	57.86437
2017	57.4525
2018	57.1351