Year	% of official school-age population
1998	50.39494
1999	50.44984
2000	51.2952
2001	51.86228
2002	54.36301
2003	55.03895
2004	55.34083
2005	56.62852
2006	58.59734
2007	60.53319
2008	62.27452
2009	62.38498
2010	62.30183
2011	64.51844
2012	64.54527
2013	64.56261
2014	64.67489