Year	Percent
2006-01-01	23.850
2007-01-01	23.950
2008-01-01	24.950
2009-01-01	26.575
2010-01-01	28.250
2011-01-01	29.625
2012-01-01	30.300
2013-01-01	31.625
2014-01-01	31.750
2015-01-01	33.000
2016-01-01	34.125
2017-01-01	35.225