Year	Percent
2000-01-01	45.025
2001-01-01	46.925
2002-01-01	49.675
2003-01-01	50.900
2004-01-01	53.000
2005-01-01	55.725
2006-01-01	58.425
2007-01-01	59.950
2008-01-01	62.350
2009-01-01	60.300
2010-01-01	53.800
2011-01-01	57.525
2012-01-01	60.475
2013-01-01	62.600
2014-01-01	63.975
2015-01-01	64.550
2016-01-01	65.275
2017-01-01	68.025