Year	% of official school-age population
1999	24.68934
2000	28.63514
2001	40.09726
2002	44.07567
2003	47.71248
2004	45.26506
2005	46.7467
2006	42.4303
2008	30.45545
2009	29.38978
2010	29.79412
2011	35.72795
2012	32.45914
2013	33.15416
2015	29.57451
2016	26.16824
2017	26.00654
2018	28.02324