Year	% of total teachers
1999	78.9767074584961
2000	74.8934326171875
2001	75.6674575805664
2002	75.3122100830078
2004	74.3373184204102
2005	89.6456527709961
2006	91.1334228515625
2007	90.8100967407227
2008	91.3417587280273
2009	91.5393295288086
2010	91.6302108764648
2011	91.5166397094727
2012	90.4033126831055
2014	83.1890335083008
2015	99.2449722290039
2016	99.2449722290039
2017	99.2449722290039