Year	Percent
1994	80.42839
1995	84.85618
1996	86.63968
1997	82.531
1998	79.63771
1999	79.94915
2000	74.38601
2001	70.48792
2002	64.93455
2003	63.10636
2004	65.0804
2005	68.54787
2006	65.49127
2007	65.91291
2008	66.26067
2009	63.78633
2010	61.50245
2011	70.77206