Year	Percent
2000-01-01	34.225
2001-01-01	34.475
2002-01-01	35.400
2003-01-01	36.050
2004-01-01	36.025
2005-01-01	35.650
2006-01-01	36.650
2007-01-01	36.825
2008-01-01	36.175
2009-01-01	35.325
2010-01-01	34.675
2011-01-01	34.275
2012-01-01	33.525
2013-01-01	33.025
2014-01-01	32.125
2015-01-01	31.900
2016-01-01	31.200
2017-01-01	30.450