Year	% of total teachers
1999	36.4132614135742
2000	55.0303802490234
2001	37.3918113708496
2002	53.6764717102051
2004	49.1842613220215
2005	48.0009498596191
2006	44.6870498657227
2007	40.9867210388184
2008	42.4459114074707
2009	43.7054595947266
2010	43.2872085571289
2011	47.7877883911133
2012	46.9476699829102
2016	100
2017	100