Year	Percent
2005-01-01	47.8859233447487
2006-01-01	48.3791413925575
2007-01-01	48.3652783823265
2008-01-01	47.7519672292654
2009-01-01	46.9294953689952
2010-01-01	47.0841081181721
2011-01-01	46.8836557337887
2012-01-01	47.2582469738816
2013-01-01	46.3683554475546
2014-01-01	45.5616622137009
2015-01-01	44.8163911620189
2016-01-01	44.2243090917882
2017-01-01	43.7753175701042