Quarter	US dollars
1986-09-30	6570
1986-12-31	7123
1987-03-31	7620
1987-06-30	7324
1987-09-30	7083
1987-12-31	8217
1988-03-31	8559
1988-06-30	7440
1988-09-30	7642
1988-12-31	6680
1989-03-31	6683
1989-06-30	6462
1989-09-30	7395
1989-12-31	8068
1990-03-31	8757
1990-06-30	8624
1990-09-30	9021
1990-12-31	9407
1991-03-31	9958
1991-06-30	8737
1991-09-30	10025
1991-12-31	9041
1992-03-31	8801
1992-06-30	9812
1992-09-30	10285
1992-12-31	8745
1993-03-31	9230
1993-06-30	10131
1993-09-30	10019
1993-12-31	9995
1994-03-31	10200
1994-06-30	11174
1994-09-30	11744
1994-12-31	11242
1995-03-31	12988
1995-06-30	13365
1995-09-30	15080
1995-12-31	13091
1996-03-31	13218
1996-06-30	12761
1996-09-30	13685
1996-12-31	12053
1997-03-31	11762
1997-06-30	13005
1997-09-30	13175
1997-12-31	11915
1998-03-31	12662
1998-06-30	11880
1998-09-30	11917
1998-12-31	7917
1999-03-31	8037
1999-06-30	6180
1999-09-30	7613
1999-12-31	7634
2000-03-31	7248
2000-06-30	8451
2000-09-30	8494
2000-12-31	8188
2001-03-31	9316
2001-06-30	11251
2001-09-30	13283
2001-12-31	13007
2002-03-31	12208
2002-06-30	12121
2002-09-30	16060
2002-12-31	13764
2003-03-31	17560
2003-06-30	16452
2003-09-30	16853
2003-12-31	16672
2004-03-31	18807
2004-06-30	20872
2004-09-30	19139
2004-12-31	20026
2005-03-31	22803
2005-06-30	20483
2005-09-30	21763
2005-12-31	14427
2006-03-31	19906
2006-06-30	20373
2006-09-30	23434
2006-12-31	21084
2007-03-31	25142
2007-06-30	33159
2007-09-30	28386
2007-12-31	25551
2008-03-31	32386
2008-06-30	29677
2008-09-30	20192
2008-12-31	20008
2009-03-31	23828
2009-06-30	23006
2009-09-30	25391
2009-12-31	18756
2010-03-31	18327
2010-06-30	19445
2010-09-30	18006
2010-12-31	14668
2011-03-31	16455
2011-06-30	16202
2011-09-30	19758
2011-12-31	15300
2012-03-31	17720
2012-06-30	16293
2012-09-30	14964
2012-12-31	14497
2013-03-31	13426
2013-06-30	12962
2013-09-30	14317
2013-12-31	11840
2014-03-31	13503
2014-06-30	14851
2014-09-30	12651
2014-12-31	11425
2015-03-31	11505
2015-06-30	10518
2015-09-30	9605
2015-12-31	7200
2016-03-31	10001
2016-06-30	9653
2016-09-30	9357
2016-12-31	8069
2017-03-31	8621
2017-06-30	8478
2017-09-30	8732
2017-12-31	8225
2018-03-31	9755
2018-06-30	9576
2018-09-30	8769
2018-12-31	7812
2019-03-31	8916
2019-06-30	8556
2019-09-30	7290
2019-12-31	6245
2020-03-31	7242
2020-06-30	9921
2020-09-30	8742
2020-12-31	7174
2021-03-31	7305
2021-06-30	7792
2021-09-30	6645
2021-12-31	5671
2022-03-31	7037
2022-06-30	6890
2022-09-30	6812
2022-12-31	6399
2023-03-31	5784
2023-06-30	4880
2023-09-30	5994