Quarter	US dollars
1986-12-31	-2303
1987-03-31	-1856
1987-06-30	1666
1987-09-30	2675
1987-12-31	1017
1988-03-31	-4936
1988-06-30	2723
1988-09-30	1991
1988-12-31	-4920
1989-03-31	4762
1989-06-30	2474
1989-09-30	167
1989-12-31	-260
1990-03-31	692
1990-06-30	-4376
1990-09-30	1408
1990-12-31	859
1991-03-31	-2700
1991-06-30	-4533
1991-09-30	-40
1991-12-31	-1121
1992-03-31	1952
1992-06-30	5446
1992-09-30	-4520
1992-12-31	16024
1993-03-31	-7879
1993-06-30	1102
1993-09-30	-3445
1993-12-31	10263
1994-03-31	-5298
1994-06-30	196
1994-09-30	6705
1994-12-31	-1152
1995-03-31	2662
1995-06-30	-4678
1995-09-30	1737
1995-12-31	2898
1996-03-31	4258
1996-06-30	4912
1996-09-30	5724
1996-12-31	3957
1997-03-31	-277
1997-06-30	10245
1997-09-30	13062
1997-12-31	18025
1998-03-31	-14396
1998-06-30	8219
1998-09-30	23447
1998-12-31	2251