Year	% of official school-age population
1997	45.20371
1998	45.12555
1999	46.24163
2000	49.68572
2001	49.66322
2002	49.81506
2003	50.86128
2004	51.4652
2005	52.40208
2006	53.35174
2007	53.78876
2008	53.8847
2009	53.97037
2010	56.24963
2011	55.84162
2012	54.57646
2013	55.05932
2014	54.39769
2015	54.82059
2016	54.6607
2017	55.31457