Year	Ratio
1970-01-01	1.07132995128632
1971-01-01	1.08759999275208
1972-01-01	1.10032999515533
1973-01-01	1.13205003738403
1974-01-01	1.10353994369507
1975-01-01	1.10931003093719
1976-01-01	1.13331997394562
1977-01-01	1.14702999591827
1979-01-01	1.14798998832703
1980-01-01	1.15901005268097
1981-01-01	1.13669002056122
1982-01-01	1.12920999526978
1983-01-01	1.12443995475769
1984-01-01	1.09453999996185
1985-01-01	1.09237003326416
1986-01-01	1.06652998924255
1987-01-01	1.05167996883392
1988-01-01	1.03751003742218
1989-01-01	1.02917003631592
1990-01-01	1.04089999198914
1991-01-01	1.05290997028351
1992-01-01	1.05480003356934
1993-01-01	1.07446002960205
1994-01-01	1.07573997974396
1995-01-01	1.08018004894257
1996-01-01	1.09001004695892
1997-01-01	1.10319995880127
1998-01-01	1.07439005374908
1999-01-01	1.08282995223999
2000-01-01	1.07477998733521
2001-01-01	1.06156003475189
2002-01-01	1.06027996540070
2004-01-01	1.04317998886108
2005-01-01	1.04330003261566
2006-01-01	1.04550004005432
2007-01-01	1.03477001190186
2008-01-01	1.04275000095367
2009-01-01	1.04604005813599
2010-01-01	1.04219996929169
2011-01-01	1.04067003726959
2012-01-01	1.03991997241974
2013-01-01	1.05894005298615
2014-01-01	1.05480003356934
2015-01-01	1.04025995731354
2016-01-01	1.05410003662109