Quarter	US dollars
1986-12-31	1317
1987-03-31	-874
1987-06-30	9345
1987-09-30	1769
1987-12-31	1308
1988-03-31	-4119
1988-06-30	5005
1988-09-30	3965
1988-12-31	2449
1989-03-31	3198
1989-06-30	3693
1989-09-30	5400
1989-12-31	597
1990-03-31	2349
1990-06-30	1638
1990-09-30	9644
1990-12-31	6203
1991-03-31	-7316
1991-06-30	5906
1991-09-30	1759
1991-12-31	-1576
1992-03-31	-1725
1992-06-30	5033
1992-09-30	2193
1992-12-31	7931
1993-03-31	-4371
1993-06-30	-2638
1993-09-30	534
1993-12-31	1800
1994-03-31	4638
1994-06-30	-3564
1994-09-30	3146
1994-12-31	3774
1995-03-31	4337
1995-06-30	3097
1995-09-30	8786
1995-12-31	4806
1996-03-31	10397
1996-06-30	5079
1996-09-30	-2927
1996-12-31	3931
1997-03-31	6873
1997-06-30	1958
1997-09-30	111843
1997-12-31	17806
1998-03-31	8598
1998-06-30	6734
1998-09-30	-7294
1998-12-31	-6922