Year	% of total teachers
2002	67.157958984375
2003	69.3799667358398
2004	72.7043228149414
2005	77.8056411743164
2006	81.4641723632812
2007	82.9337463378906
2008	84.7062606811523
2009	86.4583282470703
2010	90.0299072265625
2011	92.0928726196289
2012	94.5872802734375
2014	96.0202407836914
2016	93.2554321289062
2017	93.4350128173828
2018	98.5540618896484
2019	98.9007415771484
2020	100
2021	93.4853363037109