Year	Percent
2000	99.40048
2001	99.40024
2002	99.4
2003	99.39976
2004	99.39952
2005	99.39928
2006	99.39904
2007	99.3988
2008	99.39855
2009	99.39831
2010	99.39807
2011	99.39783
2012	99.39759
2013	99.39735
2014	99.39711
2015	99.39711