Year	Percent
1995	32.04
1996	35.56
1997	31.53
1998	33.29
1999	33.72
2000	31.93
2001	32.92
2002	30.95
2003	33.63
2004	29.65
2005	30.44
2006	32.57
2007	35.8
2008	30.87
2009	25.23
2010	24.9