Year	Percent
1995	44.76
1996	47.41
1997	48.54
1998	48.54
1999	42.4
2000	41.64
2001	43.69
2002	44.03
2003	45.82
2004	43.47
2005	44.21
2006	46.37
2007	44.61
2008	46.31
2009	41.12
2010	40.13