Year	Percent
1995	78.97
1996	79.25
1997	78.34
1998	67.31
1999	66.01
2000	65.14
2001	78.27
2002	63.07
2003	63.16
2004	59.14
2005	59
2006	59.39
2007	59.62
2008	66.01
2009	76.93
2010	74.37