Year	% of total teachers
1999	68.7580795288086
2000	69.7072296142578
2001	69.5402221679688
2002	70.7838973999023
2003	72.5560607910156
2004	71.7230911254883
2005	71.3164672851562
2006	71.38037109375
2007	71.7964477539062
2008	72.2615203857422
2009	73.1872711181641
2010	76.0028381347656
2011	75.1020278930664
2012	71.9083404541016
2014	71.549919128418
2015	65.2906188964844
2016	66.2763824462891
2017	62.8701210021973
2018	63.8255615234375
2019	81.0389404296875
2020	72.9985580444336
2021	80.118049621582
2022	66.8114166259766