Year	Months
2004-01-01	1.035444932173280
2005-01-01	1.261427460701510
2006-01-01	1.606283402369140
2007-01-01	2.032765342922050
2008-01-01	2.765828242307030
2009-01-01	3.757819697161140
2010-01-01	3.015403665782170
2011-01-01	2.810794309459650
2012-01-01	2.675258529887050
2013-01-01	2.638314398509700
2014-01-01	3.423804670857370
2015-01-01	3.373663216725240
2016-01-01	2.427975698216020
2017-01-01	2.032029672893170
2018-01-01	1.448999222331060
2019-01-01	0.800533476620436