Year	Percent
1995	89.02
1996	84.01
1997	90.01
1998	83.53
1999	68.11
2000	74.86
2001	72.3
2002	72.23
2003	74.47
2004	65
2005	74.56
2006	78.31
2007	74.31
2008	69.72
2009	66.06
2010	55.83