Year	Percent
1995	43.01
1996	40.54
1997	42.95
1998	42.64
1999	42.73
2000	40.3
2001	42.29
2002	44.64
2003	44.37
2004	47.02
2005	40.14
2006	41.69
2007	41.82
2008	42.76
2009	43.57
2010	47.02