Year	Percent
1995	62.08
1996	72.91
1997	68.99
1998	66.26
1999	65.06
2000	54.16
2001	56.22
2002	39.61
2003	27.87
2004	26.86
2005	26.08
2006	31.11
2007	35.67
2008	37.56
2009	34.85
2010	39.82