Year	Percent
1995	61.34
1996	57
1997	55.95
1998	55.61
1999	57.37
2000	58.49
2001	58.07
2002	58.07
2003	52.22
2004	56.3
2005	64.29
2006	65.16
2007	65.37
2008	69.38
2009	60.67
2010	60.49