Year	Ratio
1976-01-01	1.069810032844540
1981-01-01	0.990090012550354
1982-01-01	0.996590018272400
1983-01-01	0.994249999523163
1984-01-01	0.996720016002655
1985-01-01	0.999809980392456
1986-01-01	1.000669956207280
1987-01-01	0.983550012111664
1988-01-01	1.013700008392330
1989-01-01	1.013440012931820
1990-01-01	0.982379972934723
1991-01-01	0.993749976158142
1992-01-01	0.997739970684052
1993-01-01	0.998690009117126
1994-01-01	1.024440050125120
1995-01-01	0.994289994239807
1996-01-01	0.982360005378723
1997-01-01	1.002189993858340
1998-01-01	0.995260000228882
1999-01-01	1.002130031585690
2001-01-01	1.002009987831120
2002-01-01	0.992089986801147
2003-01-01	0.988219976425171
2004-01-01	0.986540019512177
2005-01-01	0.989570021629334
2006-01-01	0.987230002880096
2007-01-01	0.987630009651184
2008-01-01	0.990620017051697
2009-01-01	0.989730000495911
2013-01-01	0.985000014305115
2015-01-01	0.971170008182526