Year	Percent
2000-01-01	35.875
2001-01-01	36.050
2002-01-01	37.100
2003-01-01	37.825
2004-01-01	37.650
2005-01-01	37.200
2006-01-01	37.850
2007-01-01	38.075
2008-01-01	37.300
2009-01-01	36.575
2010-01-01	36.275
2011-01-01	35.950
2012-01-01	35.750
2013-01-01	35.600
2014-01-01	35.300
2015-01-01	35.450
2016-01-01	35.175
2017-01-01	34.825