Year	Ratio
1970-01-01	1.08256995677948
1971-01-01	1.06047999858856
1972-01-01	1.05938005447388
1973-01-01	1.07148003578186
1974-01-01	1.10078001022339
1975-01-01	1.09572005271912
1976-01-01	1.11654996871948
1977-01-01	1.09382998943329
1978-01-01	1.08847999572754
1979-01-01	1.09973001480103
1980-01-01	1.09349000453949
1981-01-01	1.10610997676849
1982-01-01	1.06330001354218
1983-01-01	1.06104004383087
1984-01-01	1.05402004718781
1985-01-01	1.05938994884491
1986-01-01	1.05413997173309
1989-01-01	1.04814004898071
1990-01-01	1.05622005462646
1991-01-01	1.01681005954742
1992-01-01	1.02906000614166
1993-01-01	1.05624997615814
1998-01-01	1.04077994823456
1999-01-01	1.03826999664307
2000-01-01	1.02166998386383
2002-01-01	1.01707994937897
2003-01-01	1.01259994506836
2004-01-01	1.01380002498627
2005-01-01	1.01250004768372
2006-01-01	1.02050995826721
2007-01-01	1.02634000778198
2008-01-01	1.02734005451202
2009-01-01	1.03059995174408
2010-01-01	1.03231000900269
2011-01-01	1.03308999538422
2012-01-01	1.03881001472473
2013-01-01	1.01361000537872
2014-01-01	1.01278996467590
2015-01-01	1.01063001155853
2016-01-01	1.01148998737335