Year	Percent
2000-01-01	50.075
2001-01-01	48.775
2002-01-01	48.150
2003-01-01	48.450
2004-01-01	48.825
2005-01-01	49.875
2006-01-01	50.575
2007-01-01	64.175
2008-01-01	61.850
2009-01-01	57.375
2010-01-01	51.725
2011-01-01	49.125
2012-01-01	48.650
2013-01-01	48.125
2014-01-01	45.825
2015-01-01	44.575
2016-01-01	48.400
2017-01-01	45.500