Year	Percent
2005-01-01	31.625
2006-01-01	33.100
2007-01-01	34.775
2008-01-01	35.925
2009-01-01	37.250
2010-01-01	38.225
2011-01-01	40.025
2012-01-01	41.925
2013-01-01	43.650
2014-01-01	45.675
2015-01-01	47.400
2016-01-01	49.400
2017-01-01	51.325