Year	Percent
2000-01-01	48.850
2001-01-01	48.125
2002-01-01	44.200
2003-01-01	41.775
2004-01-01	40.850
2005-01-01	40.500
2006-01-01	39.575
2007-01-01	35.975
2008-01-01	34.125
2009-01-01	32.400
2010-01-01	32.650
2011-01-01	32.450
2012-01-01	29.375
2013-01-01	25.750
2014-01-01	24.525
2015-01-01	22.350
2016-01-01	21.750
2017-01-01	21.025