Quarter	Billions of US Dollars
1973-04-01	0.019400
1973-10-01	0.017900
1974-01-01	0.016200
1975-01-01	0.025000
1977-01-01	0.025000
1983-01-01	-0.025000
1984-01-01	-0.025000
1984-07-01	0.020400
1985-04-01	0.020100
1985-10-01	-0.048905
1987-04-01	-0.006924
1988-04-01	-0.016923
1988-07-01	-0.002679
1991-07-01	-0.036454
1995-04-01	-0.059220