Year	Percent
1995	57.4
1996	57.56
1997	64.07
1998	67.51
1999	62.99
2000	58.52
2001	59.33
2002	60.7
2003	61.87
2004	58.6
2005	56.71
2006	58.34
2007	53.49
2008	55.05
2009	59.95
2010	65.1