Year	Percent
2000-01-01	36.625
2001-01-01	35.400
2002-01-01	34.700
2003-01-01	32.575
2004-01-01	31.950
2005-01-01	31.725
2006-01-01	31.650
2007-01-01	31.075
2008-01-01	30.150
2009-01-01	29.725
2010-01-01	30.800
2011-01-01	31.625
2012-01-01	30.475
2013-01-01	29.375
2014-01-01	29.100
2015-01-01	28.650
2016-01-01	27.425
2017-01-01	27.850