Year	% of total teachers
1999	58.8192901611328
2000	60.4996604919434
2001	59.3460807800293
2002	60.1254997253418
2003	62.9815711975098
2004	63.8680686950684
2005	66.5864181518555
2006	67.9665679931641
2007	69.4570083618164
2008	71.0151596069336
2009	71.4472503662109
2010	71.1677322387695
2011	72.0967102050781
2012	74.2741928100586
2013	76.9230804443359
2014	81.7593307495117
2015	87.3716201782227
2016	89.1691436767578
2017	90.6642074584961
2018	91.3458023071289
2019	92.7719802856445
2020	93.0907821655273
2021	93.2442169189453
2022	93.4633407592773