Year	% of total teachers
2002	88.6969223022461
2003	81.3347015380859
2004	70.1675186157227
2005	72.7126312255859
2006	73.4837493896484
2007	80.5617828369141
2008	82.7368927001953
2009	80.9438705444336
2010	79.0509262084961
2011	75.1720733642578
2012	85.0667724609375
2013	75.3659515380859
2014	72.9156799316406
2015	72.6691665649414
2016	73.1990585327148
2017	71.8489227294922
2018	70.3320999145508
2019	71.8108520507812
2020	73.0559387207031