Year	Percent
1993-01-01	98.6868
1994-01-01	99.0855
1995-01-01	99.3334
1996-01-01	99.3914
1997-01-01	99.7818
1998-01-01	99.9785
1999-01-01	99.7956
2000-01-01	99.6105
2001-01-01	99.7886
2002-01-01	99.9499
2003-01-01	99.9752
2004-01-01	99.9768
2005-01-01	99.9785
2006-01-01	99.9811
2007-01-01	99.9847
2008-01-01	99.9877
2009-01-01	99.9887
2010-01-01	99.9896
2011-01-01	99.9509
2012-01-01	99.9527
2013-01-01	99.9931
2014-01-01	99.9939
2015-01-01	99.9935
2016-01-01	99.9931