Year	Percent
1993-01-01	99.7079
1994-01-01	99.8379
1995-01-01	97.8799
1996-01-01	97.6093
1997-01-01	98.3097
1998-01-01	99.9478
1999-01-01	95.9868
2000-01-01	99.9452
2001-01-01	99.6543
2002-01-01	99.6429
2003-01-01	99.7940
2004-01-01	99.9585
2005-01-01	99.9899
2006-01-01	99.9929
2007-01-01	99.9950
2008-01-01	99.9966
2009-01-01	99.9972
2010-01-01	99.9952
2011-01-01	99.9940
2012-01-01	99.9948
2013-01-01	99.9929
2014-01-01	99.9897
2015-01-01	99.9776
2016-01-01	99.9669