Year	Ratio
1971-01-01	0.996039986610413
1972-01-01	0.996980011463165
1973-01-01	1.000509977340700
1974-01-01	1.006029963493350
1975-01-01	1.008900046348570
1976-01-01	0.983919978141785
1977-01-01	1.010730028152470
1978-01-01	0.978879988193512
1979-01-01	0.981149971485138
1980-01-01	0.972050011157990
1981-01-01	0.965529978275299
1982-01-01	0.985379993915558
1983-01-01	0.962800025939941
1984-01-01	0.985300004482269
1985-01-01	0.937950015068054
1986-01-01	0.943809986114502
1987-01-01	0.947170019149780
1988-01-01	0.955219984054565
1989-01-01	0.977930009365082
1990-01-01	0.969980001449585
1991-01-01	0.971719980239868
1992-01-01	0.977519989013672
1993-01-01	0.985140025615692
1994-01-01	0.985040009021759
1995-01-01	0.968909978866577
1996-01-01	0.992009997367859
1997-01-01	0.992500007152557
1998-01-01	1.005249977111820
1999-01-01	1.005329966545100
2000-01-01	1.006520032882690
2001-01-01	0.997929990291595
2002-01-01	0.990360021591187
2003-01-01	0.985239982604980
2004-01-01	0.988009989261627
2005-01-01	0.976750016212463
2006-01-01	1.000890016555790
2007-01-01	0.998960018157959
2008-01-01	1.000409960746770
2009-01-01	1.005939960479740
2010-01-01	1.006659984588620
2011-01-01	1.012709975242610
2012-01-01	0.999930024147034
2013-01-01	1.003280043601990
2014-01-01	1.016389966011050
2015-01-01	1.024710059165950
2016-01-01	1.039149999618530