Year	% of total teachers
2007	80.7841033935547
2008	79.6551132202148
2009	79.7869873046875
2010	80.5809783935547
2011	81.1702117919922
2012	80.5258178710938
2013	75.7340621948242
2014	76.2980117797852
2015	77.1378784179688
2016	77.4469833374023
2017	77.3028564453125
2018	76.4159164428711
2019	76.7990570068359
2020	77.0382080078125
2021	76.6664962768555
2022	74.4945373535156