Year	% of total teachers
1998	62.5
2000	61.2359580993652
2001	55.7746505737305
2002	54.4041481018066
2003	55.7065200805664
2004	55.0408706665039
2005	58.3333282470703
2007	61.8279609680176
2008	63.5910186767578
2009	61.6252784729004
2010	61.6252784729004
2011	63.6165618896484
2012	64.6753234863281
2013	64.6753234863281
2014	68.3291778564453
2015	71.8231964111328
2016	72.0101776123047
2019	61.8930015563965
2021	67.7570114135742