Year	Percent
1995	74.32
1996	72.88
1997	74.95
1998	79.87
1999	80.96
2000	78.75
2001	79.52
2002	71.83
2003	76.67
2004	75.33
2005	74.44
2006	70.01
2007	69.32
2008	66.52
2009	65.16
2010	61.52