Year	Percent
1995	65.4
1996	66.83
1997	68.1
1998	68.48
1999	73.27
2000	70.75
2001	75.69
2002	75.71
2003	83.15
2004	83.15
2005	87.07
2006	87.04
2007	84.93
2008	84.93
2009	79.62
2010	81.5