Year	Percent
1995	98.39
1996	98.67
1997	98.47
1998	98.35
1999	98.59
2000	98.45
2001	99.64
2002	98.6
2003	98.91
2004	99.15
2005	99.05
2006	99.22
2007	99.24
2008	99.26
2009	99.3
2010	99.3