Year	Percent
1995	65.31
1996	62.82
1997	64.82
1998	69.34
1999	66.08
2000	57.5
2001	60.22
2002	69.01
2003	53.16
2004	64.44
2005	58.9
2006	67.86
2007	76.73
2008	78.44
2009	80.28
2010	75.03