Year	Percent
2006-01-01	22.750
2007-01-01	22.775
2008-01-01	23.500
2009-01-01	24.225
2010-01-01	26.175
2011-01-01	27.825
2012-01-01	28.725
2013-01-01	29.650
2014-01-01	29.500
2015-01-01	30.450
2016-01-01	31.150
2017-01-01	32.175