Year	% of total teachers
2001	80.4177398681641
2003	86.8469772338867
2004	89.4923477172852
2005	88.2582168579102
2006	86.9417572021484
2007	87.6678924560547
2008	87.6603927612305
2009	86.1144638061523
2012	94.8324813842773
2013	85.5863876342773
2014	84.3585968017578
2015	85.4200134277344
2016	73.193733215332
2017	85.8375625610352
2018	87.5757293701172
2019	88.5932464599609
2020	89.4517974853516
2021	90.9827728271484
2022	88.3963165283203