Year	Ratio
1971-01-01	0.790790021419525
1972-01-01	0.793910026550293
1973-01-01	0.869669973850250
1974-01-01	0.880209982395172
1975-01-01	0.949370026588440
1976-01-01	0.963440001010895
1977-01-01	0.981620013713837
1978-01-01	0.991869986057281
1979-01-01	0.954559981822968
1980-01-01	1.037379980087280
1981-01-01	1.042060017585750
1982-01-01	1.004199981689450
1983-01-01	1.071660041809080
1984-01-01	1.046409964561460
1985-01-01	1.048810005187990
1986-01-01	1.079409956932070
1987-01-01	1.082309961318970
1988-01-01	1.077250003814700
1989-01-01	1.072800040245060
1990-01-01	1.059970021247860
1991-01-01	1.067250013351440
1992-01-01	1.080039978027340
1993-01-01	1.085260033607480
1994-01-01	1.086300015449520
1995-01-01	1.085379958152770
1996-01-01	1.107609987258910
1997-01-01	1.062019944190980
1998-01-01	1.072579979896550
1999-01-01	1.070850014686580
2000-01-01	1.067340016365050
2001-01-01	1.063220024108890
2002-01-01	1.070510029792790
2003-01-01	1.061450004577640
2004-01-01	1.067720055580140
2005-01-01	1.065350055694580
2006-01-01	1.063760042190550
2007-01-01	1.065870046615600
2008-01-01	1.059759974479680
2009-01-01	1.045840024948120
2010-01-01	1.022469997406010
2011-01-01	1.010859966278080
2012-01-01	1.007470011711120
2013-01-01	1.004439949989320
2014-01-01	1.004019975662230
2015-01-01	0.997550010681152
2016-01-01	1.007050037384030