Year	Months
2004-01-01	1.171426000618230
2005-01-01	1.054861821367590
2006-01-01	1.439314896540550
2007-01-01	1.278874325181810
2008-01-01	1.690925337424190
2009-01-01	0.863843197991548
2010-01-01	1.564521835066530
2011-01-01	1.020829612507100
2012-01-01	1.148597577690120
2013-01-01	1.983948813052440
2014-01-01	2.997905193903630
2015-01-01	3.190817841812070
2016-01-01	2.884593423427780
2017-01-01	3.322018719287910
2018-01-01	2.859108987383220
2019-01-01	3.079056015557820