Year	Percent
1995	46.8
1996	46.4
1997	45.23
1998	50.25
1999	47.61
2000	48.81
2001	46.06
2002	43.23
2003	43.25
2004	47.71
2005	48.13
2006	48.94
2007	49.35
2008	46.77
2009	46.24
2010	44.75