Year	Percent
2005-01-01	35.975
2006-01-01	36.575
2007-01-01	37.325
2008-01-01	37.400
2009-01-01	34.925
2010-01-01	33.900
2011-01-01	33.350
2012-01-01	32.600
2013-01-01	32.175
2014-01-01	32.425
2015-01-01	33.125
2016-01-01	33.850
2017-01-01	34.675