Year	% of total teachers
1999	32.3992309570312
2000	32.111198425293
2001	34.2415618896484
2002	35.2238807678223
2003	36.3716812133789
2004	38.2131805419922
2005	38.2340316772461
2006	40.9547691345215
2007	42.3233108520508
2008	42.2619018554688
2009	44.3023681640625
2010	82.5910034179688
2011	85.8140029907227
2012	87.0579986572266
2013	85.5169982910156
2014	86.7099990844727
2015	87.8030014038086
2016	88.7409973144531
2017	89.8659973144531
2018	92.1689987182617
2019	92.3970031738281
2020	92.4929962158203
2021	93.3619995117188
2022	93.4660034179688
2023	93.4160003662109