Quarter	Billions of US Dollars
1987-01-01	0.14196
1987-04-01	0.13866
1987-07-01	0.13852
1987-10-01	0.12716
1988-01-01	0.27786
1988-04-01	0.32105
1988-07-01	0.31283
1988-10-01	0.29808
1989-01-01	0.28478
1989-04-01	0.27049
1989-07-01	0.35797
1989-10-01	0.37215
1990-01-01	0.36214
1990-04-01	0.28412
1990-07-01	0.30791
1990-10-01	0.31985
1991-01-01	0.28820
1991-04-01	0.28159
1991-07-01	0.30082
1991-10-01	0.32568
1992-01-01	0.30275
1992-04-01	0.32395
1992-07-01	0.34710
1992-10-01	0.31413
1993-01-01	0.25460
1993-04-01	0.25265
1993-07-01	0.26128
1993-10-01	0.24531
1994-01-01	0.16727
1994-04-01	0.17479
1994-07-01	0.08126
1994-10-01	0.08021
1995-01-01	0.08954