Year	Percent
1995	50.05
1996	60.36
1997	60.8
1998	60.46
1999	56.72
2000	63.9
2001	61.8
2002	63.94
2003	64.06
2004	60.27
2005	59.83
2006	60.6
2007	61.77
2008	60.36
2009	58.82
2010	60.96