Year	% of total teachers
1999	77.3018112182617
2000	81.9008636474609
2001	93.4786911010742
2002	81.1247024536133
2004	83.4378280639648
2005	82.9673004150391
2006	89.9613876342773
2007	90.591796875
2008	90.9326934814453
2009	89.8506698608398
2010	88.3465805053711
2011	87.283561706543
2014	95.7073135375977