Year	Percent
2010-01-01	3.97142191425689
2011-01-01	3.54279851480202
2012-01-01	3.60929305478363
2013-01-01	3.97850879843723
2014-01-01	4.10672270057910
2015-01-01	4.06490647489593
2016-01-01	4.29359371998354
2017-01-01	4.06717690690926