Year	Percent
1995	60.13
1996	62.52
1997	56.11
1998	56.25
1999	56.3
2000	56.19
2001	51.35
2002	51.06
2003	53.65
2004	52.83
2005	50.01
2006	47.5
2007	50.36
2008	48.17
2009	49.72
2010	49.12