Year	Months
2007-01-01	5.249561665
2008-01-01	5.732209886
2009-01-01	6.082053992
2010-01-01	3.616113014
2011-01-01	3.529220394
2012-01-01	3.260270585
2013-01-01	2.623355580
2014-01-01	2.732303425
2015-01-01	2.200979882
2016-01-01	1.772155973