Year	Ratio
1999-01-01	0.990010023117065
2002-01-01	0.932169973850250
2003-01-01	1.015280008316040
2004-01-01	0.949190020561218
2005-01-01	1.260400056838990
2006-01-01	1.003119945526120
2007-01-01	0.989269971847534
2008-01-01	1.014950037002560
2009-01-01	1.004420042037960
2011-01-01	0.993529975414276
2015-01-01	0.998040020465851
2016-01-01	1.015890002250670