Year	Percent
1995	86.52
1996	75.97
1997	77.6
1998	76.66
1999	80.29
2000	72.74
2001	72.37
2002	71.79
2003	70.31
2004	67.96
2005	65.63
2006	66.83
2007	66.78
2008	66.88
2009	72.48
2010	70.18