Year	% of total teachers
1999	43.5614585876465
2000	50.5263214111328
2001	56.2494316101074
2011	98.5054779052734
2013	97.098991394043
2014	97.7470016479492
2015	98.6790008544922
2016	98.3908920288086
2017	98.8181381225586
2018	99.1660003662109
2019	99.7539978027344
2020	99.6790008544922
2021	81.7200012207031
2022	82.6849975585938