Year	Percent
1995	35.96
1996	34.09
1997	37.06
1998	47.53
1999	48.87
2000	39.69
2001	37.44
2002	35.42
2003	36.85
2004	34.25
2005	33.78
2006	33.14
2007	33.38
2008	34.53
2009	36.26
2010	34.87