Year	Percent
2001-01-01	49.950
2002-01-01	50.925
2003-01-01	52.275
2004-01-01	52.850
2005-01-01	50.125
2006-01-01	48.675
2007-01-01	47.775
2008-01-01	47.150
2009-01-01	48.975
2010-01-01	48.400
2011-01-01	47.025
2012-01-01	47.425
2013-01-01	45.500
2014-01-01	44.525
2015-01-01	44.850
2016-01-01	45.175
2017-01-01	45.275