Year	Percent
1995	91.34
1996	91.8
1997	89.78
1998	90.53
1999	89.47
2000	90.5
2001	93.3
2002	91.3
2003	91.32
2004	90.43
2005	94.29
2006	93.44
2007	93.5
2008	93.62
2009	93.77
2010	93.85