Year	Percent
1995	47.41
1996	39.95
1997	43.81
1998	41.39
1999	49.74
2000	47.37
2001	56.62
2002	42.6
2003	49.45
2004	43.31
2005	51.19
2006	45.27
2007	47.97
2008	46.46
2009	44.63
2010	46.49