Year	Ratio
1971-01-01	0.989650011062622
1972-01-01	0.988860011100769
1973-01-01	0.990880012512207
1974-01-01	0.997900009155273
1975-01-01	1.014379978179930
1976-01-01	1.001979947090150
1977-01-01	1.008370041847230
1978-01-01	1.026219964027400
1979-01-01	1.037729978561400
1980-01-01	1.034489989280700
1981-01-01	1.053889989852910
1982-01-01	1.064769983291630
1983-01-01	1.045950055122380
1984-01-01	1.065510034561160
1985-01-01	1.059159994125370
1986-01-01	1.053799986839290
1987-01-01	1.051939964294430
1988-01-01	1.052320003509520
1989-01-01	1.055719971656800
1990-01-01	1.041339993476870
1991-01-01	1.032860040664670
1992-01-01	1.014029979705810
1993-01-01	0.975709974765778
1994-01-01	0.972869992256165
1995-01-01	0.950309991836548
1996-01-01	0.948159992694855
1997-01-01	0.961459994316101
1998-01-01	1.003489971160890
1999-01-01	1.022979974746700
2000-01-01	1.024539947509770
2001-01-01	1.022420048713680
2002-01-01	1.020529985427860
2003-01-01	1.019670009613040
2004-01-01	1.028540015220640
2005-01-01	1.009529948234560
2006-01-01	0.996159970760345
2007-01-01	0.987209975719452
2008-01-01	0.978299975395203
2009-01-01	0.976949989795685
2010-01-01	0.984000027179718
2011-01-01	0.988269984722137
2012-01-01	0.985539972782135
2013-01-01	0.969569981098175
2014-01-01	0.966799974441528
2015-01-01	0.969169974327087
2016-01-01	0.970449984073639