Year	Percent
1995	99.57
1996	99.81
1997	99.73
1998	99.75
1999	99.77
2000	99.88
2001	99.88
2002	99.86
2003	99.9
2004	99.89
2005	99.89
2006	99.9
2007	99.89
2008	99.91
2009	99.87
2010	99.89