Year	Percent
2005-01-01	45.350
2006-01-01	44.725
2007-01-01	44.375
2008-01-01	43.900
2009-01-01	43.525
2010-01-01	43.275
2011-01-01	42.950
2012-01-01	42.400
2013-01-01	42.050
2014-01-01	41.775
2015-01-01	41.650
2016-01-01	41.300
2017-01-01	40.975