Year	Percent
2006-01-01	19.325
2007-01-01	19.375
2008-01-01	19.775
2009-01-01	19.325
2010-01-01	20.250
2011-01-01	21.225
2012-01-01	20.725
2013-01-01	21.500
2014-01-01	22.050
2015-01-01	23.000
2016-01-01	23.200
2017-01-01	23.025