Year	Months
2007-01-01	2.825044693
2008-01-01	3.636108151
2009-01-01	4.886159676
2010-01-01	3.823223667
2011-01-01	3.356492415
2012-01-01	3.421256086
2013-01-01	3.720784159
2014-01-01	4.671109758
2015-01-01	4.640035450
2016-01-01	4.385598549