Year	Percent
2000-01-01	62.100
2001-01-01	61.900
2002-01-01	61.975
2003-01-01	62.075
2004-01-01	62.075
2005-01-01	62.250
2006-01-01	62.675
2007-01-01	62.525
2008-01-01	62.775
2009-01-01	62.575
2010-01-01	62.325
2011-01-01	62.325
2012-01-01	62.475
2013-01-01	62.625
2014-01-01	62.675
2015-01-01	62.750
2016-01-01	62.900
2017-01-01	62.900