Year	Percent
2005-01-01	33.000
2006-01-01	32.600
2007-01-01	32.400
2008-01-01	31.800
2009-01-01	31.800
2010-01-01	33.000
2011-01-01	32.550
2012-01-01	32.500
2013-01-01	32.475
2014-01-01	32.075
2015-01-01	31.825
2016-01-01	31.425
2017-01-01	31.525