Year	Percent
1995	76.19
1996	75.17
1997	75.4
1998	78.5
1999	75.71
2000	72.32
2001	74.04
2002	68.25
2003	72.39
2004	73.02
2005	78.52
2006	79.32
2007	70.99
2008	69.42
2009	78.2
2010	77.47