Year	Ratio
1971-01-01	0.683600008487701
1973-01-01	0.777540028095245
1982-01-01	1.007380008697510
1985-01-01	0.944149971008301
1992-01-01	1.104979991912840
1994-01-01	1.104439973831180
1995-01-01	1.155769944190980
1996-01-01	1.135349988937380
1997-01-01	1.135710000991820
1998-01-01	1.131510019302370
1999-01-01	1.128890037536620
2000-01-01	1.120010018348690
2001-01-01	1.136729955673220
2002-01-01	1.082880020141600
2003-01-01	1.039590001106260
2004-01-01	1.020650029182430
2005-01-01	1.007660031318660
2006-01-01	0.995949983596802
2007-01-01	1.018859982490540
2008-01-01	1.013829946517940
2009-01-01	1.012799978256230
2010-01-01	1.021250009536740
2011-01-01	1.007940053939820
2012-01-01	1.009089946746830
2013-01-01	1.005429983139040
2014-01-01	1.005329966545100
2015-01-01	0.991970002651215
2016-01-01	1.004680037498470