Year	% of official school-age population
1997	56.97433
1998	56.80824
1999	55.07662
2000	55.1308
2001	56.90379
2002	56.2461
2003	55.64147
2004	55.1277
2005	53.94214
2006	52.79235
2007	51.66084
2008	51.15293
2009	50.86541
2010	51.51399
2011	51.61887
2012	51.35295
2013	51.16458
2014	51.07618
2015	51.65116
2016	51.28456
2017	51.08967
2018	50.61063