Year	% of total teachers
1998	87.5675735473633
1999	85.5442199707031
2000	86.2676086425781
2001	84.3809509277344
2003	84.8739471435547
2008	98.537483215332
2009	93.2885894775391
2012	79.6694183349609
2013	84.5378189086914
2014	86.5454483032227
2015	98.865478515625
2016	88.714729309082
2017	90.2362213134766
2018	100
2019	89.3982772827148
2020	91.7134780883789
2022	90.8283996582031