Year	%
1997	98.03708
1998	100
1999	99.49111
2000	100
2001	99.54809
2002	100
2003	99.29419
2004	98.85834
2005	100
2006	99.53537
2007	100
2008	99.53915
2009	100
2010	99.48526
2011	99.33097