Year	Percent
2000-01-01	41.675
2001-01-01	43.025
2002-01-01	44.525
2003-01-01	46.275
2004-01-01	46.925
2005-01-01	48.000
2006-01-01	48.975
2007-01-01	48.850
2008-01-01	49.000
2009-01-01	49.175
2010-01-01	49.475
2011-01-01	49.500
2012-01-01	51.025
2013-01-01	53.025
2014-01-01	54.425
2015-01-01	55.950
2016-01-01	57.400
2017-01-01	59.075