Year	Percent
1995	67.34
1996	68.04
1997	67.52
1998	65.15
1999	64.52
2000	63.93
2001	61.7
2002	69.53
2003	69.56
2004	59.76
2005	57.54
2006	55.23
2007	52.6
2008	51.11
2009	64.34
2010	62.53