Year	% of official school-age population
1998	48.45328
1999	48.57686
2000	49.0145
2001	49.98246
2002	51.16739
2003	52.78445
2004	54.04091
2005	54.88477
2006	56.3789
2007	57.17027
2008	59.15214
2009	60.40703
2010	61.60884
2011	63.41145
2012	63.81389
2013	64.70334
2014	65.21203
2015	65.56135
2016	66.93599