Year	Ratio
1989-01-01	1.085340023040770
1990-01-01	1.079879999160770
1991-01-01	1.029180049896240
1992-01-01	1.014279961586000
1993-01-01	1.002820014953610
1994-01-01	0.993830025196075
1995-01-01	0.989690005779266
1996-01-01	0.990809977054596
1997-01-01	0.997389972209930
1998-01-01	0.998040020465851
1999-01-01	1.000149965286250
2000-01-01	0.995739996433258
2001-01-01	0.994579970836639
2002-01-01	0.998409986495972
2003-01-01	0.992100000381470
2004-01-01	0.993560016155243
2005-01-01	0.988229990005493
2006-01-01	0.986769974231720
2007-01-01	0.978450000286102
2008-01-01	0.974740028381348
2009-01-01	0.971029996871948
2010-01-01	0.968389987945557
2012-01-01	0.963220000267029
2013-01-01	0.961719989776611