Year	Percent
2000-01-01	46.550
2001-01-01	45.475
2002-01-01	44.475
2003-01-01	44.400
2004-01-01	44.675
2005-01-01	45.900
2006-01-01	46.450
2007-01-01	59.125
2008-01-01	55.650
2009-01-01	47.725
2010-01-01	40.875
2011-01-01	38.175
2012-01-01	37.200
2013-01-01	37.200
2014-01-01	36.775
2015-01-01	37.275
2016-01-01	41.825
2017-01-01	39.750