Year	Ratio
1970-01-01	0.560519993305206
1971-01-01	0.700469970703125
1994-01-01	1.027089953422550
1995-01-01	1.049749970436100
1996-01-01	1.031890034675600
1997-01-01	1.053290009498600
1998-01-01	1.040570020675660
1999-01-01	1.064120054245000
2000-01-01	1.077540040016170
2001-01-01	1.088809967041020
2002-01-01	1.178169965744020
2003-01-01	1.144109964370730
2004-01-01	1.166919946670530