Year	% of total teachers
1999	58.4372406005859
2002	95.1207504272461
2004	91.5348815917969
2006	88.8222732543945
2007	94.4628067016602
2008	91.0844421386719
2009	84.4204177856445
2010	91.548713684082
2011	94.2885818481445
2012	94.4308395385742
2013	87.4098663330078
2014	81.4687271118164
2015	89.6463012695312
2016	90.0682830810547
2017	89.6463012695312
2018	89.782470703125
2019	92.780029296875
2021	90.6504135131836