Year	Ratio
1973-01-01	1.011940002441410
1974-01-01	1.010139942169190
1975-01-01	1.013919949531560
1976-01-01	1.015229940414430
1977-01-01	1.013710021972660
1978-01-01	1.011379957199100
1979-01-01	1.009660005569460
1980-01-01	1.009109973907470
1981-01-01	1.009829998016360
1982-01-01	1.008399963378910
1983-01-01	1.012680053710940
1984-01-01	1.015589952468870
1985-01-01	1.013409972190860
1986-01-01	1.011530041694640
1987-01-01	1.014719963073730
1988-01-01	1.012959957122800
1989-01-01	1.010750055313110
1990-01-01	1.010400056838990
1991-01-01	1.010089993476870
1992-01-01	1.014490008354190
1993-01-01	0.994310021400452
1994-01-01	0.997709989547729
1995-01-01	0.997250020503998
1996-01-01	0.998510003089905
1998-01-01	0.995909988880157
1999-01-01	0.994819998741150
2000-01-01	0.998269975185394
2001-01-01	1.001199960708620
2002-01-01	1.001680016517640
2003-01-01	1.001909971237180
2004-01-01	0.997200012207031
2005-01-01	0.996949970722198
2006-01-01	0.995809972286224
2007-01-01	0.995549976825714
2008-01-01	0.994920015335083
2009-01-01	0.995310008525848
2010-01-01	0.995419979095459
2011-01-01	0.995069980621338
2012-01-01	0.997609972953796
2013-01-01	0.998080015182495
2014-01-01	1.000769972801210
2015-01-01	0.997169971466064
2016-01-01	0.993130028247833