Year	Percent
1993-01-01	99.96530000000000
1994-01-01	99.87930000000000
1995-01-01	99.58000000000000
1996-01-01	99.49550000000000
1997-01-01	99.63830000000000
1998-01-01	99.70910000000000
1999-01-01	99.70610000000000
2000-01-01	99.72730000000000
2001-01-01	99.85799999999999
2002-01-01	99.86870000000000
2003-01-01	99.89340000000000
2004-01-01	99.90610000000000
2005-01-01	99.92980000000000
2006-01-01	99.95990000000000
2007-01-01	99.97480000000000
2008-01-01	99.97450000000000
2009-01-01	99.97450000000000
2010-01-01	99.97240000000000
2011-01-01	99.77290000000000
2012-01-01	99.54620000000000
2013-01-01	99.60510000000000
2014-01-01	99.67590000000000
2015-01-01	97.45480000000000
2016-01-01	93.83690000000000