Year	Percent
1995	34.22
1996	34.75
1997	33.11
1998	33.64
1999	31.61
2000	33.18
2001	33.72
2002	33.09
2003	33.89
2004	33.32
2005	33.11
2006	33.41
2007	32.49
2008	32.01
2009	32.01
2010	32.01