Year	% of official school-age population
1997	50.6718
1998	50.59501
1999	51.07611
2000	53.42296
2001	53.43259
2002	53.40533
2003	54.00899
2004	54.41079
2005	55.06448
2006	55.82433
2007	56.11655
2008	56.15387
2009	56.41386
2010	57.83451
2011	57.47332
2012	56.25248
2013	56.63569
2014	56.08011
2015	56.53551
2016	56.39525
2017	56.6748
2018	56.60882