Year	Percent
1995	46.4
1996	40.86
1997	38.64
1998	39.66
1999	38.91
2000	33.51
2001	30.76
2002	32.87
2003	35.9
2004	34.62
2005	33.56
2006	33.03
2007	33.77
2008	31.3
2009	35.47
2010	39.72