Quarter	US dollars
1986-12-31	929
1987-03-31	-1160
1987-06-30	177
1987-09-30	181
1987-12-31	642
1988-03-31	-737
1988-06-30	32
1988-09-30	436
1988-12-31	1355
1989-03-31	-892
1989-06-30	752
1989-09-30	532
1989-12-31	36
1990-03-31	-926
1990-06-30	-929
1990-09-30	613
1990-12-31	157
1991-03-31	-1347
1991-06-30	-213
1991-09-30	912
1991-12-31	333
1992-03-31	494
1992-06-30	1097
1992-09-30	1541
1992-12-31	-5
1993-03-31	1208
1993-06-30	528
1993-09-30	384
1993-12-31	-1548
1994-03-31	1174
1994-06-30	-309
1994-09-30	-332
1994-12-31	550
1995-03-31	-51
1995-06-30	1089
1995-09-30	2560
1995-12-31	710
1996-03-31	-88
1996-06-30	-195
1996-09-30	-1553
1996-12-31	1751
1997-03-31	968
1997-06-30	3719
1997-09-30	-498
1997-12-31	-663
1998-03-31	-2076
1998-06-30	2396
1998-09-30	-1840
1998-12-31	-3126