Year	Percent
1995	67.47
1996	63.66
1997	65.06
1998	64.7
1999	63
2000	63.18
2001	62.84
2002	61.48
2003	61.26
2004	62.53
2005	44.66
2006	42.8
2007	43.91
2008	45.85
2009	45.53
2010	44.51