Year	Percent
2005-01-01	39.4276836626984
2006-01-01	40.5345229879812
2007-01-01	41.5917936095498
2008-01-01	42.2836739030197
2009-01-01	42.8227126539035
2010-01-01	43.4057781578473
2011-01-01	44.3949036372791
2012-01-01	44.6602429004961
2013-01-01	45.3131790102200