Year	% of total teachers
1999	96.0546798706055
2000	95.5652389526367
2001	92.7889175415039
2002	95.0980377197266
2003	98.1838302612305
2004	93.7724075317383
2005	89.813591003418
2006	91.2217788696289
2008	89.3510589599609
2009	99.3357009887695
2010	99.3546981811523
2011	99.4168167114258
2012	99.4817276000977
2013	99.6249618530273
2014	99.9469833374023
2015	98.9687728881836
2016	98.8429794311523
2017	98.4100036621094
2019	97.5670013427734
2020	99.4629974365234
2021	99.6500015258789
2022	93.6650009155273