Year	% of official school-age population
1998	37.26982
1999	37.73435
2000	39.01536
2001	40.25369
2002	44.85804
2003	45.72414
2004	46.39821
2005	47.69464
2006	50.01279
2007	51.68899
2008	53.4647
2009	54.03114
2010	54.88316
2011	55.88932
2012	56.0778
2013	56.29397
2014	56.48692
2015	56.17069
2016	56.38898
2017	55.95402
2018	55.73179