Year	Ratio
1993-01-01	1.004760026931760
1994-01-01	0.997160017490387
1995-01-01	0.996240019798279
1996-01-01	0.996010005474091
1997-01-01	1.031890034675600
2015-01-01	0.869229972362518
2016-01-01	0.867259979248047