Year	Percent
1995	64.24
1996	65.34
1997	64.26
1998	56.23
1999	49.29
2000	48.55
2001	45.09
2002	50.1
2003	47.61
2004	49.29
2005	45.62
2006	44.41
2007	45.2
2008	47.23
2009	48.52
2010	45.79