Year	Percent
1995	59.03
1996	48.86
1997	50.9
1998	59.55
1999	67.67
2000	66.5
2001	59.89
2002	66.61
2003	63.54
2004	65.13
2005	62.73
2006	62.15
2007	57.9
2008	51.56
2009	52.77
2010	53.11