Quarter	US dollars
1986-12-31	13618
1987-03-31	11858
1987-06-30	20539
1987-09-30	26358
1987-12-31	21499
1988-03-31	3908
1988-06-30	15431
1988-09-30	26997
1988-12-31	1368
1989-03-31	31894
1989-06-30	-7758
1989-09-30	15870
1989-12-31	11404
1990-03-31	23837
1990-06-30	-1259
1990-09-30	43896
1990-12-31	17559
1991-03-31	560
1991-06-30	-24462
1991-09-30	-3222
1991-12-31	-937
1992-03-31	-5187
1992-06-30	-6699
1992-09-30	62879
1992-12-31	14509
1993-03-31	-6980
1993-06-30	-10688
1993-09-30	7790
1993-12-31	48950
1994-03-31	-2623
1994-06-30	15338
1994-09-30	30006
1994-12-31	44319
1995-03-31	29235
1995-06-30	5167
1995-09-30	15640
1995-12-31	3952
1996-03-31	17596
1996-06-30	6789
1996-09-30	28780
1996-12-31	31171
1997-03-31	82793
1997-06-30	-4178
1997-09-30	67786
1997-12-31	169543
1998-03-31	36944
1998-06-30	56417
1998-09-30	86254
1998-12-31	-52924