Year	Percent
2003-01-01	51.100
2004-01-01	51.175
2005-01-01	51.500
2006-01-01	51.800
2007-01-01	52.850
2008-01-01	53.575
2009-01-01	53.200
2010-01-01	53.175
2011-01-01	53.025
2012-01-01	53.125
2013-01-01	53.125
2014-01-01	52.850
2015-01-01	52.850
2016-01-01	52.775
2017-01-01	52.825