Quarter	US dollars
1986-12-31	30447
1987-03-31	17515
1987-06-30	33408
1987-09-30	22974
1987-12-31	12561
1988-03-31	3910
1988-06-30	26576
1988-09-30	29786
1988-12-31	2056
1989-03-31	44028
1989-06-30	-3715
1989-09-30	31546
1989-12-31	12477
1990-03-31	21568
1990-06-30	-1743
1990-09-30	43687
1990-12-31	34795
1991-03-31	-2071
1991-06-30	-30041
1991-09-30	-878
1991-12-31	-5875
1992-03-31	-22884
1992-06-30	-5671
1992-09-30	53535
1992-12-31	33210
1993-03-31	-4727
1993-06-30	-466
1993-09-30	3756
1993-12-31	49950
1994-03-31	-7159
1994-06-30	5313
1994-09-30	38953
1994-12-31	53482
1995-03-31	45510
1995-06-30	4141
1995-09-30	22161
1995-12-31	890
1996-03-31	35748
1996-06-30	14239
1996-09-30	36210
1996-12-31	49735
1997-03-31	89973
1997-06-30	17558
1997-09-30	80714
1997-12-31	115325
1998-03-31	1179
1998-06-30	60707
1998-09-30	93724
1998-12-31	-97530
1999-03-31	123609
1999-06-30	69845
1999-09-30	-43529
1999-12-31	-43829
2000-03-31	184961
2000-06-30	58956
2000-09-30	48239
2000-12-31	86683
2001-03-31	208025
2001-06-30	-55944
2001-09-30	18937
2001-12-31	59728
2002-03-31	2129
2002-06-30	2042
2002-09-30	68376
2002-12-31	123550
2003-03-31	124204
2003-06-30	131508
2003-09-30	-14581
2003-12-31	73911
2004-03-31	350758
2004-06-30	39371
2004-09-30	131152
2004-12-31	77401
2005-03-31	270842
2005-06-30	168356
2005-09-30	99750
2005-12-31	53232
2006-03-31	426186
2006-06-30	102695
2006-09-30	144538
2006-12-31	71118
2007-03-31	682748
2007-06-30	162063
2007-09-30	383848
2007-12-31	292771
2008-03-31	340458
2008-06-30	-668975
2008-09-30	250351
2008-12-31	-601871
2009-03-31	-53712
2009-06-30	-215231
2009-09-30	-89058
2009-12-31	-29335
2010-03-31	89209
2010-06-30	-96368
2010-09-30	95243
2010-12-31	-37203
2011-03-31	58755
2011-06-30	-46492
2011-09-30	78029
2011-12-31	-80697
2012-03-31	88447
2012-06-30	-236063
2012-09-30	-15725
2012-12-31	-101231
2013-03-31	-58917
2013-06-30	-176392
2013-09-30	-231535
2013-12-31	-77039
2014-03-31	-28693
2014-06-30	37372
2014-09-30	40034
2014-12-31	-48094
2015-03-31	58241
2015-06-30	-182390
2015-09-30	-32863
2015-12-31	-47003
2016-03-31	-20482
2016-06-30	178879
2016-09-30	-6081
2016-12-31	-48459
2017-03-31	71558
2017-06-30	43029
2017-09-30	3918
2017-12-31	132862
2018-03-31	75914
2018-06-30	-111428
2018-09-30	-61835
2018-12-31	157830
2019-03-31	61782
2019-06-30	33421
2019-09-30	107745
2019-12-31	-139563
2020-03-31	500653
2020-06-30	-258480
2020-09-30	54702
2020-12-31	145878
2021-03-31	70492
2021-06-30	-64083
2021-09-30	15240
2021-12-31	164749
2022-03-31	164660
2022-06-30	79609
2022-09-30	-1407
2022-12-31	-216087
2023-03-31	17989
2023-06-30	-55377
2023-09-30	88681