Year	% of total teachers
1999	63.0478515625
2000	61.1956100463867
2001	62.1032981872559
2002	63.1664886474609
2003	69.1334762573242
2004	73.9760665893555
2005	78.7303695678711
2006	76.1243286132812
2007	66.1594085693359
2008	71.0741271972656