Year	Ratio
1971-01-01	0.965219974517822
1972-01-01	0.997870028018951
1973-01-01	0.960500001907349
1977-01-01	0.972029983997345
1978-01-01	0.969410002231598
1979-01-01	0.989570021629334
1980-01-01	0.977569997310638
1981-01-01	0.993960022926331
1982-01-01	0.999979972839355
1983-01-01	1.003039956092830
1984-01-01	1.005959987640380
1985-01-01	1.004189968109130
1986-01-01	1.012959957122800
1987-01-01	1.002640008926390
1988-01-01	1.009580016136170
1989-01-01	1.043380022048950
1990-01-01	1.016160011291500
1991-01-01	0.998409986495972
1992-01-01	0.999559998512268
1993-01-01	1.010810017585750
1994-01-01	1.014639973640440
1995-01-01	1.024989962577820
1996-01-01	1.035560011863710
1997-01-01	1.026149988174440
1998-01-01	1.032649993896480
1999-01-01	1.028499960899350
2000-01-01	0.991100013256073
2001-01-01	1.048200011253360
2002-01-01	1.024950027465820
2003-01-01	0.999719977378845
2004-01-01	1.036219954490660
2005-01-01	1.014050006866460
2006-01-01	0.987479984760284
2007-01-01	1.023370027542110
2008-01-01	1.044430017471310
2009-01-01	1.052870035171510
2014-01-01	1.036049962043760
2015-01-01	1.032330036163330
2016-01-01	1.025380015373230