Quarter	US dollars
1986-09-30	2350
1986-12-31	1958
1987-03-31	2790
1987-06-30	3508
1987-09-30	3064
1987-12-31	2772
1988-03-31	3990
1988-06-30	3709
1988-09-30	3727
1988-12-31	2534
1989-03-31	3469
1989-06-30	3082
1989-09-30	3613
1989-12-31	2778
1990-03-31	3331
1990-06-30	3386
1990-09-30	4441
1990-12-31	4852
1991-03-31	6137
1991-06-30	5994
1991-09-30	6114
1991-12-31	5115
1992-03-31	5170
1992-06-30	4696
1992-09-30	7405
1992-12-31	5963
1993-03-31	5547
1993-06-30	5210
1993-09-30	4978
1993-12-31	4674
1994-03-31	4718
1994-06-30	5379
1994-09-30	4882
1994-12-31	5568
1995-03-31	5386
1995-06-30	6655
1995-09-30	6617
1995-12-31	9813
1996-03-31	10559
1996-06-30	11329
1996-09-30	13163
1996-12-31	9719
1997-03-31	11217
1997-06-30	11102
1997-09-30	12883
1997-12-31	10552
1998-03-31	9359
1998-06-30	11530
1998-09-30	13869
1998-12-31	12893
1999-03-31	12999
1999-06-30	13465
1999-09-30	15389
1999-12-31	14093
2000-03-31	15675
2000-06-30	15188
2000-09-30	12082
2000-12-31	11989
2001-03-31	13685
2001-06-30	12622
2001-09-30	13627
2001-12-31	12224
2002-03-31	13895
2002-06-30	14034
2002-09-30	11777
2002-12-31	10956
2003-03-31	15763
2003-06-30	16422
2003-09-30	16212
2003-12-31	18890
2004-03-31	25647
2004-06-30	20917
2004-09-30	28139
2004-12-31	29496
2005-03-31	24716
2005-06-30	24648
2005-09-30	21956
2005-12-31	21852
2006-03-31	31137
2006-06-30	29273
2006-09-30	31426
2006-12-31	26545
2007-03-31	33612
2007-06-30	30009
2007-09-30	39816
2007-12-31	39195
2008-03-31	37131
2008-06-30	28537
2008-09-30	25387
2008-12-31	20262
2009-03-31	22168
2009-06-30	20818
2009-09-30	22544
2009-12-31	18847
2010-03-31	23062
2010-06-30	19832
2010-09-30	25078
2010-12-31	19903
2011-03-31	24470
2011-06-30	23598
2011-09-30	24628
2011-12-31	22569
2012-03-31	19892
2012-06-30	20056
2012-09-30	24560
2012-12-31	25713
2013-03-31	25043
2013-06-30	26100
2013-09-30	27543
2013-12-31	26764
2014-03-31	26625
2014-06-30	28637
2014-09-30	28050
2014-12-31	28113
2015-03-31	24915
2015-06-30	23759
2015-09-30	23525
2015-12-31	27439
2016-03-31	26051
2016-06-30	27297
2016-09-30	30810
2016-12-31	27711
2017-03-31	27967
2017-06-30	29966
2017-09-30	31573
2017-12-31	32559
2018-03-31	30586
2018-06-30	31662
2018-09-30	29847
2018-12-31	25777
2019-03-31	28790
2019-06-30	26397
2019-09-30	24449
2019-12-31	25982
2020-03-31	27969
2020-06-30	22642
2020-09-30	23124
2020-12-31	21662
2021-03-31	19525
2021-06-30	18653
2021-09-30	17654
2021-12-31	19537
2022-03-31	16152
2022-06-30	16123
2022-09-30	15893
2022-12-31	15138
2023-03-31	14596
2023-06-30	14390
2023-09-30	16870