Year	Percent
1995	89.54
1996	89.54
1997	89.23
1998	88.12
1999	87.56
2000	87.1
2001	87.4
2002	87.18
2003	88.12
2004	88.05
2005	88.19
2006	87.97
2007	87.33
2008	87.71
2009	87.97
2010	88.05