Year	% of total teachers
2000	47.2081184387207
2009	41.2979393005371
2010	42.9394798278809
2011	47.0255012512207
2014	55.1928787231445
2015	44.2529983520508
2017	51.1685104370117
2018	47.692310333252
2019	49.6370010375977