Year	% of total teachers
1999	97.7521133422852
2000	97.3542022705078
2001	79.8889465332031
2002	69.6274566650391
2003	72.4565811157227
2004	75.7501373291016
2005	85.0012283325195
2006	91.9078216552734
2007	98.2364807128906
2008	98.4377288818359
2009	98.013542175293
2013	45.8434600830078
2014	50.0832214355469
2015	55.5236015319824
2016	55.6421012878418
2018	61.6092796325684
2021	95.9954986572266
2022	97.5435333251953
2023	98.7409973144531