Year	% of total teachers
1998	82.4078674316406
1999	82.6035232543945
2000	82.8432693481445
2001	82.7354736328125
2002	82.8916931152344
2003	82.7630004882812
2004	82.2645263671875
2005	81.5925903320312
2006	81.9276428222656
2007	81.7188873291016
2008	80.2889022827148
2009	79.2539367675781
2010	79.7336807250977
2011	79.4889678955078
2012	78.1505737304688
2013	80.331787109375
2014	82.7090606689453
2015	82.4100799560547
2016	81.6687164306641
2017	81.450798034668
2018	83.0283203125
2019	82.0005187988281
2020	81.1610565185547
2021	79.9416122436523
2022	79.332389831543