Year	% of official school-age population
1998	35.2669
1999	35.4906
2000	36.84288
2001	38.01684
2002	42.39625
2003	43.54427
2004	44.87811
2005	47.02967
2006	49.99961
2007	52.31181
2008	54.98274
2009	54.57353
2010	54.74785
2011	57.13731
2012	57.31227
2013	57.51904
2014	57.72956
2015	57.42018
2016	57.40339
2017	56.97513
2018	56.67832