Quarter	Billions of US Dollars
1987-01-01	0.83678
1987-04-01	0.79420
1987-07-01	0.79367
1987-10-01	0.83483
1988-01-01	0.82327
1988-04-01	0.82963
1988-07-01	0.96565
1988-10-01	0.99282
1989-01-01	0.94293
1989-04-01	0.96887
1989-07-01	0.95930
1989-10-01	0.98063
1990-01-01	0.96494
1990-04-01	0.97376
1990-07-01	1.01343
1990-10-01	1.03333
1991-01-01	0.98057
1991-04-01	0.96956
1991-07-01	1.00162
1991-10-01	1.04307
1992-01-01	1.00483
1992-04-01	1.04019
1992-07-01	0.93686
1992-10-01	0.89990
1993-01-01	0.91532
1993-04-01	0.42782
1993-07-01	0.34652
1993-10-01	0.32560
1994-01-01	0.34856
1994-04-01	0.26956
1994-07-01	0.27120
1994-10-01	0.26770
1995-01-01	0.29882
1995-04-01	0.22104
1995-07-01	0.10173