Year	Percent
1995	54.94
1996	55.65
1997	57.86
1998	55.71
1999	53.94
2000	55.74
2001	50.69
2002	55.75
2003	52.19
2004	52.07
2005	47.72
2006	47.21
2007	46
2008	44.7
2009	42.8
2010	46.8