Year	% of total teachers
2004	76.0839309692383
2005	77.2144393920898
2006	78.4593124389648
2007	78.0166473388672
2008	81.3124389648438
2009	81.5425109863281
2010	82.2234115600586
2011	85.6001129150391
2012	85.6001510620117
2013	73.330436706543
2014	74.1322021484375
2015	75.8283386230469
2016	77.2554931640625
2017	77.6103286743164
2018	77.9801177978516
2019	79.2265777587891
2020	79.9329223632812
2021	80.8164520263672