Year	Percent
1995	46.38
1996	40.09
1997	38.85
1998	44.4
1999	39.85
2000	46.27
2001	44.73
2002	42.82
2003	43.37
2004	41.85
2005	42.23
2006	41.3
2007	42.38
2008	39.7
2009	43.34
2010	44.3