Quarter	US dollars
1986-12-31	9569
1987-03-31	7775
1987-06-30	19151
1987-09-30	21012
1987-12-31	5243
1988-03-31	1620
1988-06-30	9279
1988-09-30	22900
1988-12-31	-15627
1989-03-31	28802
1989-06-30	-7553
1989-09-30	10819
1989-12-31	11019
1990-03-31	-5554
1990-06-30	-10196
1990-09-30	15556
1990-12-31	41083
1991-03-31	-28280
1991-06-30	-41669
1991-09-30	1057
1991-12-31	5402
1992-03-31	-26019
1992-06-30	-6945
1992-09-30	40105
1992-12-31	68267
1993-03-31	-5858
1993-06-30	-8162
1993-09-30	1421
1993-12-31	47324
1994-03-31	-20054
1994-06-30	2093
1994-09-30	26467
1994-12-31	43556
1995-03-31	21625
1995-06-30	39
1995-09-30	4182
1995-12-31	-4635
1996-03-31	-16890
1996-06-30	128
1996-09-30	25638
1996-12-31	37719
1997-03-31	30275
1997-06-30	-5036
1997-09-30	23371
1997-12-31	111862
1998-03-31	-32146
1998-06-30	22560
1998-09-30	61095
1998-12-31	-4588