Year	Ratio
1994-01-01	1.022529959678650
2003-01-01	0.999750018119812
2004-01-01	0.994189977645874
2005-01-01	0.989639997482300
2006-01-01	0.984820008277893
2007-01-01	0.981540024280548
2008-01-01	0.976339995861053
2009-01-01	0.983659982681274
2011-01-01	0.983600020408630
2012-01-01	0.982800006866455
2013-01-01	0.985130012035370
2014-01-01	0.979730010032654
2015-01-01	0.979480028152466
2016-01-01	0.985419988632202