Year	Percent
1995	48.36
1996	57.57
1997	56.85
1998	46.72
1999	48.75
2000	51.23
2001	51.96
2002	50.28
2003	49.32
2004	51.61
2005	48.8
2006	48.89
2007	50.33
2008	53.97
2009	49.01
2010	52.2