Year	% of total teachers
2005	68.0819396972656
2006	67.6950836181641
2008	82.1452789306641
2010	66.1050033569336
2011	80.376350402832
2012	74.5147171020508
2013	74.1184005737305
2014	75.0039520263672
2015	75.6872634887695
2016	75.3609313964844
2017	76.8499984741211
2018	73.5279998779297
2019	74.6429977416992
2020	76.7044677734375
2021	69.2040023803711