Year	% of official school-age population
2003	28.82765
2004	28.75114
2005	28.78288
2006	29.90407
2007	27.04242
2008	28.44189
2009	23.17748
2010	20.94546
2011	20.98688
2012	17.76541
2015	17.7624
2016	18.68096
2017	23.37722