Year	Percent
1995	45.6
1996	45.29
1997	47.95
1998	43.99
1999	43.44
2000	41.3
2001	42.07
2002	42.38
2003	41.31
2004	41.2
2005	40.59
2006	43.7
2007	41.5
2008	37.7
2009	42.3
2010	45.98