Year	Ratio
1971-01-01	0.723760008811951
1972-01-01	0.851779997348785
1973-01-01	0.887030005455017
1974-01-01	0.940789997577667
1975-01-01	0.947009980678558
1976-01-01	0.961160004138947
1977-01-01	0.943899989128113
1978-01-01	0.923579990863800
1979-01-01	0.859939992427826
1980-01-01	0.848619997501373
1981-01-01	0.808979988098145
1982-01-01	0.847880005836487
1983-01-01	0.861140012741089
1984-01-01	0.910449981689453
1985-01-01	0.924549996852875
1986-01-01	0.954739987850189
1987-01-01	0.956709980964661
1988-01-01	0.972649991512299
1989-01-01	1.008020043373110
1990-01-01	1.023309946060180
1991-01-01	1.042889952659610
1992-01-01	1.070880055427550
1993-01-01	1.066650032997130
1994-01-01	1.057960033416750
1995-01-01	1.039499998092650
1996-01-01	1.049870014190670
1997-01-01	1.081249952316280
1998-01-01	1.072010040283200
1999-01-01	1.069470047950740
2000-01-01	1.049559950828550
2001-01-01	1.073420047760010
2002-01-01	1.120300054550170
2003-01-01	1.120360016822810
2004-01-01	1.109680056571960
2005-01-01	1.109240055084230
2006-01-01	1.097800016403200
2008-01-01	1.080469965934750
2009-01-01	1.048380017280580
2010-01-01	1.013610005378720
2011-01-01	0.977240025997162
2012-01-01	1.019479990005490
2013-01-01	1.014150023460390
2014-01-01	1.008640050888060
2015-01-01	0.995400011539459
2016-01-01	1.008139967918400