Year	Percent
1995	60.35
1996	69.66
1997	71.77
1998	72.8
1999	69.1
2000	79.59
2001	75.96
2002	69.92
2003	71.36
2004	67.66
2005	63.26
2006	58
2007	55.56
2008	49.14
2009	59.24
2010	59.38