Quarter	Billions of US Dollars
1987-04-01	-0.005000
1987-07-01	-0.002622
1988-04-01	-0.005000
1988-10-01	-0.002674
1989-04-01	-0.025000
1989-07-01	-0.002409
1990-04-01	-0.064411
1990-07-01	-0.002994
1994-04-01	-0.096780