Year	Percent
1995	94.78
1996	88.33
1997	81.34
1998	81.74
1999	81.88
2000	82.99
2001	82.24
2002	83.95
2003	85.18
2004	84.68
2005	80.83
2006	78.89
2007	82.25
2008	80.21
2009	77.73
2010	76.36