Quarter	US dollars
1986-12-31	1280
1987-03-31	-478
1987-06-30	-188
1987-09-30	-837
1987-12-31	284
1988-03-31	-1609
1988-06-30	660
1988-09-30	-764
1988-12-31	1235
1989-03-31	-1320
1989-06-30	-491
1989-09-30	-890
1989-12-31	1632
1990-03-31	-333
1990-06-30	1053
1990-09-30	475
1990-12-31	117
1991-03-31	-1332
1991-06-30	60
1991-09-30	581
1991-12-31	-572
1992-03-31	1616
1992-06-30	-107
1992-09-30	172
1992-12-31	127
1993-03-31	29
1993-06-30	424
1993-09-30	311
1993-12-31	980
1994-03-31	-926
1994-06-30	-486
1994-09-30	720
1994-12-31	464
1995-03-31	1685
1995-06-30	1010
1995-09-30	2385
1995-12-31	4939
1996-03-31	2388
1996-06-30	3316
1996-09-30	2253
1996-12-31	4873
1997-03-31	3118
1997-06-30	2314
1997-09-30	17063
1997-12-31	-516
1998-03-31	6162
1998-06-30	-1352
1998-09-30	2477
1998-12-31	-722