Year	Ratio
1992-01-01	0.444130003452301
1993-01-01	1.282299995422360
1994-01-01	1.038959980010990
1996-01-01	0.889219999313354
1997-01-01	0.793969988822937
1999-01-01	1.044669985771180
2000-01-01	0.890030026435852
2001-01-01	0.723810017108917
2002-01-01	0.810930013656616
2003-01-01	0.701560020446777
2004-01-01	0.821539998054504
2005-01-01	0.726339995861053
2006-01-01	0.676519989967346
2007-01-01	0.689559996128082
2008-01-01	0.679159998893738
2009-01-01	0.698130011558533
2010-01-01	0.691320002079010
2011-01-01	0.677070021629334