Year	Percent
2000-01-01	32.675
2001-01-01	33.900
2002-01-01	34.450
2003-01-01	33.925
2004-01-01	34.200
2005-01-01	35.075
2006-01-01	32.350
2007-01-01	31.650
2008-01-01	31.250
2009-01-01	32.075
2010-01-01	33.050
2011-01-01	31.975
2012-01-01	31.650
2013-01-01	31.600
2014-01-01	31.125
2015-01-01	30.550
2016-01-01	29.425
2017-01-01	28.600