Year	Percent
1995	64.19
1996	59.64
1997	60.64
1998	59.95
1999	58.26
2000	57.87
2001	57.22
2002	55.59
2003	54.97
2004	55.26
2005	34.07
2006	33.07
2007	34.48
2008	36
2009	35.75
2010	34.95