Year	Percent
2005-01-01	52.275
2006-01-01	52.375
2007-01-01	52.425
2008-01-01	52.250
2009-01-01	53.275
2010-01-01	53.925
2011-01-01	54.475
2012-01-01	54.725
2013-01-01	55.125
2014-01-01	55.625
2015-01-01	55.825
2016-01-01	55.950
2017-01-01	55.950