Year	Percent
1995	52.93
1996	55.86
1997	55.52
1998	57
1999	45.55
2000	42.36
2001	39.32
2002	36.72
2003	30.81
2004	42.8
2005	45.03
2006	44.52
2007	43.45
2008	41.81
2009	38.65
2010	38.6