Year	Percent
1995	32.19
1996	24.01
1997	31.23
1998	34.64
1999	40.56
2000	38.08
2001	36.9
2002	36.44
2003	51.15
2004	46.57
2005	52.91
2006	46.27
2007	44.21
2008	42.97
2009	40.13
2010	38.26