Year	% of total teachers
2010	57.9661712646484
2011	53.5443992614746
2012	54.3064498901367
2013	63.340160369873
2014	64.6144714355469
2015	59.1952590942383
2016	65.5795364379883
2017	74.1498184204102
2018	76.066520690918
2019	82.3597106933594