Year	Percent
1995	70.86
1996	70.34
1997	70.3
1998	66
1999	65.11
2000	66.23
2001	62.56
2002	62.48
2003	49.66
2004	42.21
2005	44.95
2006	43.16
2007	51.8
2008	52.01
2009	46.55
2010	49.15