Year	% of total teachers
2009	50.0356101989746
2011	48.0336685180664
2012	48.3297004699707
2013	48.8618316650391
2014	46.9109992980957
2015	59.9629516601562
2016	59.5218086242676
2017	58.2339706420898
2018	59.7505683898926
2019	60.8344383239746
2020	63.9856109619141
2021	66.635871887207
2022	69.4532165527344