Year	Percent
1995	58.52
1996	58.64
1997	60.17
1998	63.99
1999	59.64
2000	57.5
2001	58.8
2002	58.79
2003	58.52
2004	59.52
2005	61.8
2006	65.08
2007	64.26
2008	68.19
2009	66.49
2010	63.75