Year	% of total teachers
1999	58.9517593383789
2000	49.941520690918
2001	53.7565002441406
2002	48.5768814086914
2003	54.6214714050293
2004	54.7176513671875
2005	49.8175506591797
2006	52.2232093811035
2007	60.2606887817383
2008	60.3601303100586
2009	59.3674201965332
2010	61.8215293884277
2011	61.5479698181152
2012	60.1806106567383
2013	60.901538848877
2014	59.4844512939453
2015	61.3375091552734