Year	Percent
2003-01-01	59.900
2004-01-01	61.200
2005-01-01	60.600
2006-01-01	61.100
2007-01-01	63.650
2008-01-01	60.375
2009-01-01	52.300
2010-01-01	51.200
2011-01-01	51.575
2012-01-01	51.675
2013-01-01	49.550
2014-01-01	47.925
2015-01-01	54.550
2016-01-01	50.900
2017-01-01	53.125