Year	Ratio
1971-01-01	1.007760047912600
1972-01-01	1.007949948310850
1973-01-01	1.011250019073490
1974-01-01	1.009760022163390
1975-01-01	1.010020017623900
1976-01-01	1.011360049247740
1977-01-01	1.012879967689510
1978-01-01	1.014179944992070
1979-01-01	1.016800045967100
1980-01-01	1.018610000610350
1981-01-01	1.020720005035400
1982-01-01	1.020980000495910
1983-01-01	1.021929979324340
1984-01-01	1.024479985237120
1985-01-01	1.025410056114200
1986-01-01	1.020020008087160
1987-01-01	1.022490024566650
1988-01-01	1.025859951972960
1989-01-01	1.027469992637630
1990-01-01	1.031260013580320
1991-01-01	1.031119942665100
1992-01-01	1.021080017089840
1993-01-01	1.030769944190980
1994-01-01	0.982100009918213
1995-01-01	0.982699990272522
1996-01-01	0.980970025062561
1997-01-01	0.980750024318695
1998-01-01	0.980870008468628
1999-01-01	0.977909982204437
2000-01-01	0.978760004043579
2001-01-01	0.979319989681244
2002-01-01	0.978829979896545
2003-01-01	0.976480007171631
2004-01-01	0.974720001220703
2005-01-01	0.977219998836517
2006-01-01	0.979059994220734
2007-01-01	0.982469975948334
2008-01-01	0.985270023345947
2009-01-01	0.989939987659454
2010-01-01	0.996550023555756
2011-01-01	0.999239981174469
2012-01-01	0.999809980392456
2013-01-01	0.999490022659302
2014-01-01	0.999920010566711
2015-01-01	0.999589979648590
2016-01-01	1.000069975852970