Quarter	US dollars
1986-12-31	2869
1987-03-31	-856
1987-06-30	-16
1987-09-30	-1849
1987-12-31	-1196
1988-03-31	-2054
1988-06-30	-224
1988-09-30	-1970
1988-12-31	-236
1989-03-31	-1886
1989-06-30	666
1989-09-30	-2153
1989-12-31	-1492
1990-03-31	-4563
1990-06-30	-2676
1990-09-30	-860
1990-12-31	-491
1991-03-31	-2602
1991-06-30	-138
1991-09-30	-639
1991-12-31	22
1992-03-31	3347
1992-06-30	1062
1992-09-30	1138
1992-12-31	-975
1993-03-31	137
1993-06-30	-668
1993-09-30	-555
1993-12-31	4992
1994-03-31	-1919
1994-06-30	2302
1994-09-30	466
1994-12-31	-656
1995-03-31	-1507
1995-06-30	3214
1995-09-30	4680
1995-12-31	6467
1996-03-31	6335
1996-06-30	7957
1996-09-30	7669
1996-12-31	8986
1997-03-31	14223
1997-06-30	11380
1997-09-30	24113
1997-12-31	-4641
1998-03-31	8403
1998-06-30	1658
1998-09-30	-12737
1998-12-31	-1338