Year	Percent
1995	59.63
1996	60.51
1997	59.82
1998	58.78
1999	57.48
2000	57.72
2001	55
2002	52.67
2003	49.92
2004	53.84
2005	59.48
2006	63.29
2007	57.6
2008	48.14
2009	47.49
2010	46.74