Year	Percent
1995	48.31
1996	47.03
1997	47.41
1998	47.65
1999	48.27
2000	45.07
2001	46.25
2002	47.35
2003	47.29
2004	48.16
2005	48.47
2006	47.6
2007	47.63
2008	45.91
2009	45.12
2010	45.7