Quarter	US dollars
1986-12-31	-2564
1987-03-31	739
1987-06-30	4777
1987-09-30	3704
1987-12-31	-1702
1988-03-31	-2455
1988-06-30	2605
1988-09-30	1767
1988-12-31	-6496
1989-03-31	-4962
1989-06-30	8470
1989-09-30	3077
1989-12-31	1554
1990-03-31	367
1990-06-30	4996
1990-09-30	2720
1990-12-31	-1806
1991-03-31	-3989
1991-06-30	-5720
1991-09-30	-654
1991-12-31	-5836
1992-03-31	-2596
1992-06-30	8067
1992-09-30	153
1992-12-31	5457
1993-03-31	-5889
1993-06-30	8347
1993-09-30	-4680
1993-12-31	-2393
1994-03-31	3737
1994-06-30	-2292
1994-09-30	3837
1994-12-31	-2687
1995-03-31	3555
1995-06-30	6159
1995-09-30	6707
1995-12-31	3090
1996-03-31	2693
1996-06-30	3234
1996-09-30	11569
1996-12-31	3129
1997-03-31	12178
1997-06-30	11255
1997-09-30	-828
1997-12-31	4412
1998-03-31	-21223
1998-06-30	-2263
1998-09-30	15273
1998-12-31	-26562