Year	Percent
2005-01-01	39.375
2006-01-01	40.050
2007-01-01	41.025
2008-01-01	40.525
2009-01-01	36.850
2010-01-01	35.500
2011-01-01	35.000
2012-01-01	33.625
2013-01-01	32.775
2014-01-01	32.325
2015-01-01	32.450
2016-01-01	32.975
2017-01-01	33.925