Year	% of total teachers
2003	90.7087326049805
2004	87.1836929321289
2005	86.2696075439453
2006	85.3843994140625
2007	85.1707534790039
2008	84.2062530517578
2009	83.6169281005859
2010	82.5419998168945
2011	81.1358337402344
2012	80.9626312255859
2013	77.1270370483398
2014	76.4953308105469
2015	76.0869216918945
2016	73.6824569702148
2017	76.2578125
2018	79.1529998779297
2019	77.8174133300781
2020	79.6966171264648
2021	83.1969680786133
2022	83.1158905029297