Year	Percent
1995	42.55
1996	42.68
1997	45.37
1998	44.4
1999	49.68
2000	51.3
2001	42.98
2002	50.33
2003	48.7
2004	38.1
2005	33.65
2006	43.49
2007	37.64
2008	41.96
2009	43.29
2010	40.51