Year	Percent
2000-01-01	48.400
2001-01-01	47.650
2002-01-01	46.900
2003-01-01	46.400
2004-01-01	45.800
2005-01-01	44.050
2006-01-01	42.825
2007-01-01	38.675
2008-01-01	38.850
2009-01-01	39.600
2010-01-01	40.450
2011-01-01	40.675
2012-01-01	40.825
2013-01-01	40.225
2014-01-01	40.550
2015-01-01	40.550
2016-01-01	39.750
2017-01-01	39.625