Year	Percent
2005-01-01	40.200
2006-01-01	40.175
2007-01-01	40.800
2008-01-01	40.875
2009-01-01	40.350
2010-01-01	39.200
2011-01-01	39.075
2012-01-01	38.625
2013-01-01	38.325
2014-01-01	37.550
2015-01-01	37.225
2016-01-01	37.275
2017-01-01	37.375