Year	Percent
2005-01-01	3.48198451157934
2006-01-01	3.49124438883289
2007-01-01	3.53869978141924
2008-01-01	3.93058389592074
2009-01-01	5.57123617035872
2010-01-01	5.58729992594617
2011-01-01	5.39099882024779
2012-01-01	5.08682643729701
2013-01-01	5.07707491034342
2014-01-01	4.98634384734904
2015-01-01	4.41892682376785
2016-01-01	4.00267911932880
2017-01-01	3.45449874391555