Year	% of total teachers
1999	63.9802589416504
2000	64.6179428100586
2001	61.1021118164062
2002	60.1018714904785
2003	60.363639831543
2004	63.5838203430176
2005	59.9229316711426
2006	64.2166290283203
2007	61.1222381591797
2008	59.4000015258789
2009	57.8431396484375
2010	60.8267707824707
2011	57.7299385070801
2012	60.6589088439941
2013	65.2173919677734
2014	64.814811706543
2015	64.4981384277344
2016	65.7142868041992
2019	62.8571395874023
2020	57.5
2021	61.8691596984863
2022	66.6666717529297