Year	Percent
1995	74.15
1996	70.4
1997	72.52
1998	75.95
1999	74.91
2000	69.71
2001	72.65
2002	74.92
2003	76.01
2004	67.55
2005	67.77
2006	69.51
2007	72.98
2008	72.4
2009	73.42
2010	73.49