Year	Percent
2000-01-01	40.850
2001-01-01	39.800
2002-01-01	38.625
2003-01-01	38.275
2004-01-01	37.800
2005-01-01	37.175
2006-01-01	36.500
2007-01-01	35.150
2008-01-01	34.250
2009-01-01	33.675
2010-01-01	35.150
2011-01-01	35.225
2012-01-01	34.600
2013-01-01	34.650
2014-01-01	35.375
2015-01-01	34.925
2016-01-01	34.875
2017-01-01	34.700