Year	Percent
1995	60.32
1996	64.47
1997	64.56
1998	61.73
1999	61.63
2000	59.55
2001	55.79
2002	54.23
2003	51.75
2004	52.03
2005	49.5
2006	51.46
2007	50.95
2008	53.47
2009	54
2010	54