Year	Percent
2000-01-01	33.625
2001-01-01	35.700
2002-01-01	36.150
2003-01-01	38.300
2004-01-01	38.925
2005-01-01	39.425
2006-01-01	43.075
2007-01-01	42.475
2008-01-01	38.275
2009-01-01	43.125
2010-01-01	43.425
2011-01-01	45.325
2012-01-01	43.725
2013-01-01	44.075
2014-01-01	46.950
2015-01-01	44.750
2016-01-01	46.025
2017-01-01	46.475