Year	Ratio
1971-01-01	1.01170003414154
1972-01-01	1.02151000499725
1973-01-01	1.02173995971680
1974-01-01	1.02172005176544
1975-01-01	1.02227997779846
1976-01-01	1.02321004867554
1977-01-01	1.02154004573822
1978-01-01	1.02163004875183
1979-01-01	1.02161002159119
1980-01-01	1.02215003967285
1981-01-01	1.02409005165100
1982-01-01	1.02404999732971
1983-01-01	1.02427995204926
1984-01-01	1.02348005771637
1985-01-01	1.01765000820160
1986-01-01	1.01870000362396
1987-01-01	1.01870000362396
1988-01-01	1.02035999298096
1989-01-01	1.02250003814697
1990-01-01	1.02494001388550
1991-01-01	1.01665997505188
1992-01-01	1.01699995994568
1993-01-01	1.02228999137878
1994-01-01	1.01653003692627
1995-01-01	1.01602005958557
1998-01-01	1.01692998409271
1999-01-01	1.01672005653381
2000-01-01	1.01611995697021
2001-01-01	1.01485002040863
2002-01-01	1.01260995864868
2003-01-01	1.00955998897552
2004-01-01	1.00739002227783
2005-01-01	1.00578999519348
2006-01-01	1.00563001632690
2007-01-01	1.00597000122070
2008-01-01	1.00573003292084
2009-01-01	1.00732004642487
2010-01-01	1.00665998458862
2011-01-01	1.00776994228363
2012-01-01	1.00812995433807
2013-01-01	1.00813996791840
2014-01-01	1.00713002681732
2015-01-01	1.00591003894806