Year	Percent
1995	46.3
1996	50.41
1997	51.42
1998	48.08
1999	49.03
2000	33.19
2001	33.65
2002	35.67
2003	26.01
2004	34.96
2005	35.18
2006	39.03
2007	38.52
2008	38.79
2009	33.68