Year	Percent
2005-01-01	49.8433252083053
2006-01-01	50.1566780400893
2007-01-01	50.4786630319031
2008-01-01	50.8631034942459
2009-01-01	49.4003313590127
2010-01-01	51.5465702092512
2011-01-01	52.8819787801036
2012-01-01	52.9326279428150
2013-01-01	53.1786074078142
2014-01-01	52.8374767376219
2015-01-01	53.1509958549188
2016-01-01	53.0346126962513
2017-01-01	53.1401924750101