Year	Percent
2005-01-01	59.425
2006-01-01	59.325
2007-01-01	59.300
2008-01-01	59.225
2009-01-01	59.650
2010-01-01	60.250
2011-01-01	60.475
2012-01-01	60.575
2013-01-01	60.700
2014-01-01	61.100
2015-01-01	61.200
2016-01-01	61.000
2017-01-01	60.825