Year	Months
2007-01-01	5.275197145
2008-01-01	7.550410865
2009-01-01	7.439307898
2010-01-01	7.231881063
2011-01-01	6.864024500
2012-01-01	3.845573914
2013-01-01	3.243341597
2014-01-01	3.214784839
2015-01-01	3.063918103
2016-01-01	2.236455133