Quarter	US dollars
1986-09-30	2905
1986-12-31	3488
1987-03-31	3988
1987-06-30	3766
1987-09-30	3903
1987-12-31	4399
1988-03-31	4111
1988-06-30	3891
1988-09-30	4021
1988-12-31	4182
1989-03-31	4344
1989-06-30	3856
1989-09-30	4174
1989-12-31	4475
1990-03-31	4203
1990-06-30	4177
1990-09-30	4454
1990-12-31	4177
1991-03-31	4950
1991-06-30	6506
1991-09-30	5244
1991-12-31	3481
1992-03-31	3777
1992-06-30	3915
1992-09-30	4089
1992-12-31	4082
1993-03-31	4795
1993-06-30	4641
1993-09-30	5015
1993-12-31	5688
1994-03-31	4840
1994-06-30	4843
1994-09-30	5079
1994-12-31	4415
1995-03-31	5668
1995-06-30	5755
1995-09-30	4869
1995-12-31	4455
1996-03-31	4306
1996-06-30	4684
1996-09-30	4313
1996-12-31	4793
1997-03-31	4871
1997-06-30	5563
1997-09-30	6724
1997-12-31	7388
1998-03-31	10892
1998-06-30	7271
1998-09-30	7975
1998-12-31	8584
1999-03-31	10220
1999-06-30	8944
1999-09-30	10539
1999-12-31	11563
2000-03-31	11622
2000-06-30	11912
2000-09-30	12616
2000-12-31	13742
2001-03-31	13360
2001-06-30	13730
2001-09-30	15804
2001-12-31	17728
2002-03-31	22384
2002-06-30	22210
2002-09-30	23602
2002-12-31	23150
2003-03-31	23881
2003-06-30	28005
2003-09-30	29894
2003-12-31	30586
2004-03-31	20388
2004-06-30	20403
2004-09-30	21147
2004-12-31	21559
2005-03-31	18644
2005-06-30	17854
2005-09-30	20906
2005-12-31	18087
2006-03-31	22303
2006-06-30	20585
2006-09-30	20983
2006-12-31	19193
2007-03-31	22318
2007-06-30	23588
2007-09-30	23541
2007-12-31	22944
2008-03-31	22941
2008-06-30	20972
2008-09-30	15007
2008-12-31	18533
2009-03-31	24106
2009-06-30	23048
2009-09-30	22385
2009-12-31	19918
2010-03-31	23701
2010-06-30	27510
2010-09-30	27601
2010-12-31	20065
2011-03-31	25122
2011-06-30	28345
2011-09-30	33732
2011-12-31	33654
2012-03-31	42484
2012-06-30	42707
2012-09-30	48913
2012-12-31	52125
2013-03-31	57013
2013-06-30	57685
2013-09-30	61029
2013-12-31	54785
2014-03-31	68581
2014-06-30	68554
2014-09-30	69600
2014-12-31	68999
2015-03-31	72848
2015-06-30	78900
2015-09-30	79941
2015-12-31	76452
2016-03-31	78197
2016-06-30	74632
2016-09-30	72997
2016-12-31	64619
2017-03-31	63447
2017-06-30	62223
2017-09-30	57995
2017-12-31	54047
2018-03-31	57127
2018-06-30	51710
2018-09-30	58981
2018-12-31	55714
2019-03-31	68614
2019-06-30	72103
2019-09-30	72550
2019-12-31	68604
2020-03-31	73068
2020-06-30	73240
2020-09-30	77364
2020-12-31	77375
2021-03-31	78529
2021-06-30	84287
2021-09-30	81463
2021-12-31	76128
2022-03-31	80674
2022-06-30	78089
2022-09-30	73857
2022-12-31	76762
2023-03-31	81181
2023-06-30	86728
2023-09-30	88000