Year	% of total teachers
1999	32.794750213623
2000	32.6449584960938
2002	27.8768997192383
2003	25.7954502105713
2007	46.4451713562012
2008	52.345630645752
2010	57.1822395324707
2011	99.9700012207031
2012	77.2699966430664
2013	100
2014	79.8580017089844
2015	84.9339981079102
2016	81.8960037231445
2017	89.4828414916992
2019	85.4023513793945
2020	85.9898681640625
2021	85.9899978637695
2023	95.5199966430664