Year	% of total teachers
2004	73.1415023803711
2005	84.8052825927734
2006	79.8776779174805
2007	84.8817367553711
2008	85.5101699829102
2009	84.5211029052734
2010	90.2474822998047
2011	79.4144897460938
2012	89.8517990112305
2013	76.2565689086914
2015	82.8313980102539
2021	100