Year	% of total teachers
2001	81.5895690917969
2002	81.5740127563477
2003	81.9755477905273
2004	84.0607299804688
2006	93.0489730834961
2007	87.4086837768555
2008	88.3000335693359
2009	89.5200424194336
2010	92.9375686645508
2011	93.6616821289062
2012	93.9129791259766
2013	94.078498840332
2014	100
2015	100
2016	100
2017	100