Year	Percent
2000-01-01	38.075
2001-01-01	40.525
2002-01-01	39.500
2003-01-01	39.225
2004-01-01	42.025
2005-01-01	39.475
2006-01-01	38.550
2007-01-01	36.625
2008-01-01	31.725
2009-01-01	32.750
2010-01-01	35.675
2011-01-01	32.950
2012-01-01	34.675
2013-01-01	33.100
2014-01-01	30.850
2015-01-01	32.250
2016-01-01	29.600
2017-01-01	28.025