Year	% of official school-age population
1998	35.83678
1999	36.13329
2000	37.5358
2001	38.77092
2002	43.23667
2003	44.39303
2004	45.73567
2005	47.99447
2006	50.88468
2007	53.18209
2008	55.89262
2009	55.48072
2010	55.63224
2011	58.21528
2012	58.33324
2013	58.54721
2014	58.8184
2015	58.56448
2016	58.54425
2017	58.14293
2018	57.76501