Year	% of total teachers
1999	74.0563812255859
2000	80.3550186157227
2001	92.7863693237305
2002	81.0136337280273
2004	82.0025482177734
2005	82.5036773681641
2006	89.7329864501953
2007	90.0224227905273
2008	89.9871597290039
2009	87.8633575439453
2010	86.5493316650391
2011	85.2560119628906
2012	84.9738388061523
2014	93.7732391357422
2015	94.017219543457
2016	94.017219543457
2017	94.017219543457