Year	% of total teachers
2000	78.9450225830078
2001	78.352912902832
2002	78.5619888305664
2003	78.1066131591797
2004	78.0280914306641
2005	78.4003524780273
2006	79.6869888305664
2007	80.3200378417969
2008	79.1053085327148
2009	79.4657363891602
2010	78.7555084228516
2011	78.6418762207031
2012	79.0221633911133
2013	78.0752716064453
2014	77.2827377319336
2015	76.9149627685547
2016	76.1819915771484
2017	75.7325897216797
2018	75.6894989013672
2019	75.5287170410156
2020	74.7202224731445
2021	75.4170379638672