Year	Percent
1995	65.6
1996	64.32
1997	61.76
1998	66.58
1999	64.29
2000	63.2
2001	63.28
2002	65.27
2003	77.46
2004	79.22
2005	83.05
2006	79.48
2007	73.91
2008	73.3
2009	69.25
2010	69.55