Year	% of total teachers
1998	88.1443328857422
1999	86.1538467407227
2000	80.0970916748047
2001	80.5128173828125
2002	81.188117980957
2003	76.7955780029297
2008	91.7475662231445
2009	99.4818725585938
2010	70.6900024414062
2011	73.7142868041992
2012	63.9534912109375
2013	60.5128211975098
2014	66.1202163696289
2015	81.1764678955078
2016	86.0215072631836
2017	85.7142868041992
2018	86.3095169067383
2019	86.2275390625
2020	78.6982192993164
2021	68.4848480224609
2022	69.6774215698242