Year	Percent
2005-01-01	45.550
2006-01-01	46.700
2007-01-01	47.800
2008-01-01	48.500
2009-01-01	49.050
2010-01-01	49.600
2011-01-01	51.000
2012-01-01	51.225
2013-01-01	51.900
2014-01-01	52.250
2015-01-01	52.400
2016-01-01	53.550
2017-01-01	54.025