Year	% of total teachers
2005	73.2471084594727
2007	70.3799133300781
2008	60.9540596008301
2009	58.0584907531738
2010	58.495979309082
2011	55.4069786071777
2014	68.7687683105469
2015	65.8333282470703
2016	69.0276870727539
2017	79.8063583374023
2018	76.470588684082
2019	75.1072998046875
2020	75.0677490234375
2021	75.7970123291016
2022	75.8296813964844