Year	% of total teachers
2005	59.8327598571777
2006	64.5675888061523
2007	63.1916885375977
2008	66.967529296875
2009	71.1575393676758
2010	75.9430770874023
2011	80.1040115356445
2012	83.6394882202148
2013	87.3258895874023
2014	89.9568481445312
2015	93.2438735961914
2016	95.1432571411133
2017	97.1921615600586
2018	97.2461471557617
2019	97.9570007324219
2020	98.4043502807617
2022	99.2083435058594