Year	Percent
2005-01-01	4.25159454536581
2006-01-01	3.82599567827634
2007-01-01	3.80887218413438
2008-01-01	3.74580807975265
2009-01-01	5.83706334229820
2010-01-01	4.46325056974861
2011-01-01	3.76597325247743
2012-01-01	3.45720464297992
2013-01-01	2.95738066992421
2014-01-01	3.80445310160892
2015-01-01	3.22199656204026
2016-01-01	3.77485128688278
2017-01-01	4.01432332213978