Year	% of total teachers
1998	35.1931304931641
1999	32.3955001831055
2000	29.3962001800537
2001	29.3718204498291
2002	29.6420593261719
2004	22.2026405334473
2005	32.9579086303711
2006	33.3762893676758
2007	39.2252082824707
2008	32.8770790100098
2010	33.2879791259766
2022	70.5246887207031