Year	Percent
2000-01-01	36.100
2001-01-01	36.650
2002-01-01	37.425
2003-01-01	36.325
2004-01-01	36.200
2005-01-01	36.250
2006-01-01	33.950
2007-01-01	33.800
2008-01-01	33.000
2009-01-01	33.300
2010-01-01	33.375
2011-01-01	32.325
2012-01-01	32.050
2013-01-01	31.700
2014-01-01	31.650
2015-01-01	30.275
2016-01-01	29.275
2017-01-01	28.075