Year	Ratio
1981-01-01	0.997070014476776
1986-01-01	1.004209995269780
1989-01-01	0.997439980506897
1990-01-01	0.997940003871918
1991-01-01	0.998279988765717
1992-01-01	1.000839948654170
1993-01-01	1.003419995307920
1994-01-01	1.002050042152400
1995-01-01	0.993719995021820
1999-01-01	0.989380002021790
2000-01-01	0.991559982299805
2001-01-01	0.991190016269684
2002-01-01	0.993669986724854
2003-01-01	0.999469995498657
2005-01-01	1.002030014991760
2006-01-01	1.006289958953860
2007-01-01	1.002670049667360
2008-01-01	1.003350019454960
2009-01-01	1.004420042037960
2011-01-01	1.006289958953860
2012-01-01	1.006379961967470
2013-01-01	1.005939960479740
2014-01-01	1.007120013237000
2015-01-01	1.007840037345890
2016-01-01	1.005020022392270