Year	% of total teachers
2004	96.0332489013672
2005	93.6581268310547
2006	91.8415298461914
2007	90.7478790283203
2008	90.6970901489258
2009	91.6159973144531
2010	91.5888290405273
2011	91.2179565429688
2012	89.2816467285156
2013	86.0624008178711
2014	87.0232315063477
2015	85.0943298339844
2016	84.0720977783203
2017	84.9317932128906
2018	85.5390777587891
2019	84.3048934936523
2020	83.8264389038086
2021	85.3869705200195
2022	85.4196701049805