Year	Percent
1995	79.48
1996	83.44
1997	82.18
1998	83.12
1999	82.45
2000	81.89
2001	84.23
2002	78.61
2003	79.33
2004	85.82
2005	78.92
2006	72.11
2007	65.98
2008	56.57
2009	54.85
2010	55.09