Year	% of total teachers
1999	29.1666698455811
2000	29.3478298187256
2001	31.4814796447754
2002	32.8125
2003	34.306568145752
2004	35.1144981384277
2005	31.9148902893066
2006	43.269229888916
2007	43.9252281188965
2008	30
2009	41.25
2010	45.4545516967773
2011	45.2755889892578
2012	44.3548393249512
2014	46.4843788146973
2016	48.7455215454102