Year	% of total teachers
1999	71.8954162597656
2000	89.0243911743164
2003	78.6069717407227
2006	74.2267990112305
2007	71.6279067993164
2014	80.2867431640625
2015	91.6083908081055
2016	81.2101898193359
2017	80.1393737792969
2018	95.1417007446289
2019	71.6417922973633
2020	76.2237777709961
2021	85
2022	50.1754417419434