Quarter	US dollars
1986-09-30	6346
1986-12-31	6539
1987-03-31	6040
1987-06-30	6470
1987-09-30	6460
1987-12-31	7514
1988-03-31	7130
1988-06-30	6904
1988-09-30	6865
1988-12-31	6994
1989-03-31	7193
1989-06-30	7238
1989-09-30	6582
1989-12-31	6622
1990-03-31	7347
1990-06-30	7246
1990-09-30	7490
1990-12-31	7106
1991-03-31	6786
1991-06-30	6130
1991-09-30	6166
1991-12-31	6154
1992-03-31	6027
1992-06-30	6234
1992-09-30	6288
1992-12-31	6271
1993-03-31	6679
1993-06-30	6394
1993-09-30	5987
1993-12-31	6105
1994-03-31	5228
1994-06-30	5253
1994-09-30	4842
1994-12-31	5411
1995-03-31	4858
1995-06-30	4836
1995-09-30	4422
1995-12-31	5981
1996-03-31	5199
1996-06-30	5626
1996-09-30	5519
1996-12-31	10136
1997-03-31	8865
1997-06-30	9559
1997-09-30	9688
1997-12-31	11093
1998-03-31	11276
1998-06-30	11123
1998-09-30	10198
1998-12-31	11132
1999-03-31	11586
1999-06-30	11426
1999-09-30	12246
1999-12-31	11468
2000-03-31	11629
2000-06-30	12434
2000-09-30	14847
2000-12-31	15605
2001-03-31	15836
2001-06-30	12112
2001-09-30	12649
2001-12-31	12989
2002-03-31	13742
2002-06-30	14760
2002-09-30	14919
2002-12-31	16420
2003-03-31	20140
2003-06-30	24165
2003-09-30	23228
2003-12-31	23709
2004-03-31	24109
2004-06-30	28705
2004-09-30	31958
2004-12-31	30749
2005-03-31	46036
2005-06-30	41850
2005-09-30	41052
2005-12-31	42493
2006-03-31	39110
2006-06-30	52759
2006-09-30	60937
2006-12-31	69313
2007-03-31	71369
2007-06-30	70083
2007-09-30	105173
2007-12-31	81550
2008-03-31	81336
2008-06-30	81485
2008-09-30	77924
2008-12-31	58664
2009-03-31	55205
2009-06-30	41254
2009-09-30	40565
2009-12-31	30213
2010-03-31	27567
2010-06-30	28881
2010-09-30	28719
2010-12-31	23313
2011-03-31	33319
2011-06-30	24034
2011-09-30	30707
2011-12-31	24347
2012-03-31	27980
2012-06-30	25811
2012-09-30	26457
2012-12-31	29266
2013-03-31	31250
2013-06-30	26821
2013-09-30	30049
2013-12-31	33616
2014-03-31	31604
2014-06-30	25990
2014-09-30	20965
2014-12-31	28053
2015-03-31	28156
2015-06-30	36396
2015-09-30	38364
2015-12-31	34518
2016-03-31	35582
2016-06-30	36773
2016-09-30	32348
2016-12-31	29710
2017-03-31	33366
2017-06-30	33756
2017-09-30	33467
2017-12-31	39337
2018-03-31	38516
2018-06-30	34244
2018-09-30	32563
2018-12-31	38063
2019-03-31	35141
2019-06-30	37194
2019-09-30	34215
2019-12-31	38545
2020-03-31	37030
2020-06-30	35641
2020-09-30	31375
2020-12-31	33216
2021-03-31	33197
2021-06-30	33227
2021-09-30	34619
2021-12-31	46815
2022-03-31	44546
2022-06-30	39480
2022-09-30	49539
2022-12-31	51336
2023-03-31	52864
2023-06-30	45055
2023-09-30	46750