Year	Percent
2005-01-01	34.200
2006-01-01	35.750
2007-01-01	37.250
2008-01-01	38.250
2009-01-01	39.975
2010-01-01	41.050
2011-01-01	42.975
2012-01-01	45.300
2013-01-01	47.325
2014-01-01	49.450
2015-01-01	51.125
2016-01-01	53.100
2017-01-01	54.850