Year	Percent
1998-01-01	89.4000
1999-01-01	67.2000
2000-01-01	58.6000
2001-01-01	58.6000
2002-01-01	58.6000
2003-01-01	58.6000
2004-01-01	58.6000
2005-01-01	65.5000
2006-01-01	93.9000
2007-01-01	86.1000
2008-01-01	81.4000
2009-01-01	68.7000
2010-01-01	70.6397
2011-01-01	76.2223
2012-01-01	77.9143
2013-01-01	78.2960
2014-01-01	69.5075
2015-01-01	69.3468
2016-01-01	72.4512