Year	Percent
2003-01-01	52.200
2004-01-01	52.200
2005-01-01	53.100
2006-01-01	52.400
2007-01-01	53.650
2008-01-01	53.150
2009-01-01	55.175
2010-01-01	55.175
2011-01-01	54.775
2012-01-01	55.725
2013-01-01	55.925
2014-01-01	56.550
2015-01-01	56.000
2016-01-01	55.200
2017-01-01	56.050