Year	% of total teachers
2012	44.3596000671387
2013	45.4951782226562
2014	31.8472003936768
2015	31.2774505615234
2017	55.2570381164551
2018	53.1101303100586
2019	47.5094604492188
2020	52.1816291809082
2021	48.3621101379395