Year	% of primary school age children
1971	64.97287
1972	66.09758
1974	63.63501
1975	68.58822
1976	71.81099
1978	80.85473
1981	85.4964
1987	96.5612
1989	96.20638
1990	94.69707
1991	93.84556
1992	92.80349
1993	91.71061
1994	92.04318
1995	91.711
1996	91.25248
1997	91.17466
2001	95.43455
2002	95.02285
2003	94.16388
2004	93.37879
2005	91.87563
2006	93.20646
2007	95.18329
2008	95.19553
2009	95.77599
2010	97.57204
2011	98.75686
2012	96.39396
2013	94.14146
2014	92.59846
2016	91.35384
2017	92.76452
2018	92.01633