Year	Percent
1995	68.69
1996	64.58
1997	69.82
1998	61.89
1999	65.49
2000	67.69
2001	65.89
2002	66.67
2003	84.8
2004	75.07
2005	80.85
2006	79.86
2007	82.29
2008	82.05
2009	78.98
2010	78.11