Year	Percent
2003-01-01	58.250
2004-01-01	58.275
2005-01-01	58.425
2006-01-01	58.625
2007-01-01	59.625
2008-01-01	60.325
2009-01-01	59.900
2010-01-01	59.825
2011-01-01	59.700
2012-01-01	60.075
2013-01-01	60.350
2014-01-01	60.325
2015-01-01	60.650
2016-01-01	60.925
2017-01-01	61.225