Year	Percent
1995	52.73
1996	52.78
1997	55.55
1998	54.35
1999	54.57
2000	54.05
2001	51.83
2002	60.51
2003	59.97
2004	59.07
2005	59.8
2006	58
2007	54.97
2008	54.49
2009	52.87
2010	53.55