Year	Percent
2006-01-01	44.575
2007-01-01	44.650
2008-01-01	44.850
2009-01-01	44.225
2010-01-01	46.275
2011-01-01	48.400
2012-01-01	48.900
2013-01-01	49.525
2014-01-01	49.525
2015-01-01	50.150
2016-01-01	50.650
2017-01-01	51.550