Year	% of total teachers
1998	79.2875137329102
2012	88.1541290283203
2013	85.862907409668
2014	89.1579971313477
2015	93.8645629882812
2016	98.1245193481445
2017	97.4158477783203
2018	97.1383972167969
2019	97.2520370483398
2020	97.7685623168945
2021	97.620002746582
2022	97.9020004272461