Year	Percent
1995	53.62
1996	59.91
1997	61.15
1998	55.6
1999	60.15
2000	53.73
2001	55.27
2002	57.18
2003	56.63
2004	58.15
2005	57.77
2006	58.7
2007	57.62
2008	60.3
2009	56.66
2010	55.7