Year	Percent
1995	78.26
1996	77.88
1997	74.48
1998	71.54
1999	74.3
2000	71.4
2001	65.05
2002	63.69
2003	65.71
2004	55.99
2005	53.4
2006	49.5
2007	53.5
2008	48.63
2009	49.22
2010	48.35