Year	Percent
1995	32.05
1996	31.66
1997	34.79
1998	34.61
1999	34.59
2000	34.2
2001	32.44
2002	31.6
2003	34.41
2004	35.45
2005	35.61
2006	35.24
2007	36
2008	34.51
2009	41.42
2010	34.99