Year	Ratio
1999-01-01	1.058879971504210
2000-01-01	1.033429980278020
2001-01-01	1.046730041503910
2002-01-01	1.053769946098330
2003-01-01	1.048169970512390
2004-01-01	0.999769985675812
2005-01-01	1.003640055656430
2006-01-01	0.988430023193359
2007-01-01	1.029829978942870
2008-01-01	1.071750044822690
2009-01-01	1.049870014190670
2010-01-01	1.051810026168820
2011-01-01	1.056069970130920
2012-01-01	1.017600059509280