Year	Percent
2000-01-01	33.475
2001-01-01	38.275
2002-01-01	41.900
2003-01-01	40.900
2004-01-01	37.625
2005-01-01	35.725
2006-01-01	28.350
2007-01-01	19.950
2008-01-01	15.250
2009-01-01	20.175
2010-01-01	22.425
2011-01-01	23.650
2012-01-01	24.075
2013-01-01	25.400
2014-01-01	22.675
2015-01-01	20.675
2016-01-01	17.450
2017-01-01	14.600