Year	% of total teachers
2003	61.9799118041992
2004	60.6931114196777
2005	62.070499420166
2007	75.4929580688477
2008	78.9566802978516
2009	80.7853698730469
2010	81.2606506347656
2012	86.0937881469727
2014	86.8830490112305
2016	89.9639587402344
2017	93.689453125
2018	96.0115585327148
2019	95.5974807739258
2020	90.9856796264648
2021	95.1488418579102