Year	Months
2007-01-01	5.756783197
2008-01-01	4.864558196
2009-01-01	6.974164496
2010-01-01	5.560473131
2011-01-01	10.378319680
2012-01-01	7.122547581
2013-01-01	6.697218069
2014-01-01	10.797843660
2015-01-01	11.863264450
2016-01-01	13.711590070