Year	Percent
2000-01-01	46.525
2001-01-01	48.050
2002-01-01	49.275
2003-01-01	50.225
2004-01-01	50.800
2005-01-01	53.075
2006-01-01	54.425
2007-01-01	55.250
2008-01-01	55.725
2009-01-01	54.825
2010-01-01	55.100
2011-01-01	55.475
2012-01-01	55.150
2013-01-01	57.550
2014-01-01	58.550
2015-01-01	60.275
2016-01-01	61.100
2017-01-01	62.200