Year	Percent
1995	43.53
1996	43.39
1997	43.53
1998	42.91
1999	47.63
2000	52.03
2001	58.85
2002	52.81
2003	49.12
2004	46.93
2005	47.75
2006	49.78
2007	47.33
2008	45.12
2009	49.18
2010	44.97