Quarter	Billions of US Dollars
1972-10-01	0.02000
1973-04-01	0.02150
1975-10-01	0.03000
1977-01-01	0.03000
1977-04-01	0.05100
1978-01-01	0.04320
1978-07-01	0.02540
2002-07-01	0.60833
2002-10-01	0.37794
2004-04-01	0.02408