Year	Percent
1995	52.16
1996	57.36
1997	48.77
1998	52.57
1999	45.38
2000	49.95
2001	40.55
2002	37.17
2003	30.27
2004	33.12
2005	34.65
2006	39.16
2007	42
2008	46.12
2009	45.09
2010	53.55