Year	Percent
1995	82.52
1996	82.42
1997	82.28
1998	82.08
1999	83.95
2000	83.86
2001	84.18
2002	84.49
2003	84.55
2004	84.27
2005	84.48
2006	84.64
2007	84.73
2008	84.95
2009	85.04
2010	85.11