Year	Percent
2006-01-01	27.675
2007-01-01	27.175
2008-01-01	27.500
2009-01-01	28.200
2010-01-01	29.550
2011-01-01	31.325
2012-01-01	31.850
2013-01-01	31.475
2014-01-01	31.400
2015-01-01	31.800
2016-01-01	33.425
2017-01-01	34.425