Year	Percent
1995	47.74
1996	60.42
1997	63.88
1998	65.55
1999	69.92
2000	67.11
2001	55.07
2002	59.81
2003	55.89
2004	50.77
2005	53.49
2006	51.8
2007	51.98
2008	53.5
2009	52.76
2010	53.42