Year	Percent
2001-01-01	49.975
2002-01-01	51.525
2003-01-01	52.750
2004-01-01	52.925
2005-01-01	51.025
2006-01-01	49.200
2007-01-01	48.225
2008-01-01	47.375
2009-01-01	48.925
2010-01-01	48.050
2011-01-01	46.850
2012-01-01	48.250
2013-01-01	46.125
2014-01-01	45.125
2015-01-01	46.150
2016-01-01	45.800
2017-01-01	45.925