Year	Percent
1995	49.95
1996	39.64
1997	39.2
1998	39.54
1999	43.28
2000	36.1
2001	38.2
2002	36.06
2003	35.94
2004	39.73
2005	40.17
2006	39.4
2007	38.23
2008	39.64
2009	41.18
2010	39.04