Year	Percent
1995	62.15
1996	59.73
1997	60
1998	59.65
1999	64.38
2000	58.03
2001	57.97
2002	63.69
2003	56.23
2004	54.28
2005	57.72
2006	57.33
2007	56.12
2008	56.3
2009	52.08
2010	47.07