Year	Ratio
1971-01-01	0.991370022296906
1972-01-01	0.990800023078918
1973-01-01	0.996779978275299
1974-01-01	1.008649945259090
1975-01-01	1.011059999465940
1976-01-01	1.015319943428040
1977-01-01	1.018100023269650
1978-01-01	1.020079970359800
1979-01-01	1.020679950714110
1980-01-01	1.025169968605040
1981-01-01	1.021530032157900
1982-01-01	1.013100028038020
1983-01-01	1.001109957695010
1984-01-01	1.000939965248110
1985-01-01	1.001590013504030
1986-01-01	1.000939965248110
1987-01-01	1.000270009040830
1988-01-01	1.003080010414120
1989-01-01	1.017699956893920
1990-01-01	1.008780002593990
1991-01-01	1.004979968070980
1992-01-01	0.999660015106201
1993-01-01	0.993830025196075
1994-01-01	0.995069980621338
1995-01-01	1.000929951667790
1996-01-01	1.001610040664670
1998-01-01	0.994040012359619
1999-01-01	1.017169952392580
2000-01-01	1.019330024719240
2005-01-01	0.977880001068115
2006-01-01	0.979809999465942
2007-01-01	0.978030025959015
2008-01-01	0.976509988307953
2009-01-01	0.976760029792786
2010-01-01	0.976499974727631
2011-01-01	0.979719996452332
2012-01-01	0.997510015964508
2013-01-01	1.002020001411440
2014-01-01	1.005280017852780
2015-01-01	1.008389949798580
2016-01-01	1.014670014381410