Year	Percent
1995	60.19
1996	61.57
1997	59.26
1998	59.23
1999	58.95
2000	58.96
2001	61.01
2002	59.81
2003	61.66
2004	57
2005	52.03
2006	55.85
2007	54.7
2008	55.2
2009	55.71
2010	55.51