Year	Months
2004-01-01	0.352023989029329
2005-01-01	0.414638502981722
2006-01-01	0.269691002906313
2007-01-01	0.245631482277512
2008-01-01	0.137964324559577
2009-01-01	1.120325090355720
2010-01-01	1.103164986059130
2011-01-01	1.343408945409040
2012-01-01	1.502728068144820
2013-01-01	1.421959347355780
2014-01-01	1.704679391176200
2015-01-01	1.240946545087180
2016-01-01	0.546496201160247
2017-01-01	0.456014546763136
2018-01-01	0.625084717724435
2019-01-01	0.733374731219979