Year	Ratio
1972-01-01	0.774879992008209
1973-01-01	0.838429987430573
1974-01-01	0.867479979991913
1976-01-01	0.944580018520355
1977-01-01	0.938459992408752
2004-01-01	1.062459945678710
2005-01-01	1.082620024681090