Year	% of total teachers
1999	59.2571296691895
2001	68.8973236083984
2002	61.2969589233398
2004	49.7392082214355
2005	50.169189453125
2007	100
2009	100
2010	100
2011	100
2012	100
2013	100
2014	100
2015	100
2016	100
2019	100
2020	100