Year	Percent
1995	66.46
1996	64.19
1997	66.02
1998	67.95
1999	69.26
2000	69.01
2001	65.51
2002	65.18
2003	64.18
2004	63.35
2005	63.14
2006	65.72
2007	66.36
2008	67.88
2009	67.1
2010	70.97