Quarter	US dollars
1986-09-30	12513
1986-12-31	13012
1987-03-31	12946
1987-06-30	13064
1987-09-30	12704
1987-12-31	12739
1988-03-31	12458
1988-06-30	12255
1988-09-30	12224
1988-12-31	11831
1989-03-31	11596
1989-06-30	11525
1989-09-30	11717
1989-12-31	11225
1990-03-31	9550
1990-06-30	8850
1990-09-30	9491
1990-12-31	10584
1991-03-31	11722
1991-06-30	12990
1991-09-30	12643
1991-12-31	13582
1992-03-31	14461
1992-06-30	12732
1992-09-30	12912
1992-12-31	11679
1993-03-31	12465
1993-06-30	12541
1993-09-30	11765
1993-12-31	12407
1994-03-31	11494
1994-06-30	11735
1994-09-30	12595
1994-12-31	11356
1995-03-31	10014
1995-06-30	9275
1995-09-30	8244
1995-12-31	7974
1996-03-31	7937
1996-06-30	7587
1996-09-30	8198
1996-12-31	7828
1997-03-31	8237
1997-06-30	8240
1997-09-30	7893
1997-12-31	8500
1998-03-31	8946
1998-06-30	8417
1998-09-30	7491
1998-12-31	7834
1999-03-31	8196
1999-06-30	8047
1999-09-30	8652
1999-12-31	8477
2000-03-31	8166
2000-06-30	6880
2000-09-30	7552
2000-12-31	7135
2001-03-31	7391
2001-06-30	6972
2001-09-30	6359
2001-12-31	6806
2002-03-31	6538
2002-06-30	6229
2002-09-30	6122
2002-12-31	5892
2003-03-31	5584
2003-06-30	5552
2003-09-30	5713
2003-12-31	4973
2004-03-31	8818
2004-06-30	5552
2004-09-30	5279
2004-12-31	5433
2005-03-31	5044
2005-06-30	4746
2005-09-30	4525
2005-12-31	4815
2006-03-31	6375
2006-06-30	7257
2006-09-30	8357
2006-12-31	8888
2007-03-31	8846
2007-06-30	8720
2007-09-30	8676
2007-12-31	7466
2008-03-31	7370
2008-06-30	7553
2008-09-30	7631
2008-12-31	6077
2009-03-31	5440
2009-06-30	5003
2009-09-30	6243
2009-12-31	6189
2010-03-31	7479
2010-06-30	6660
2010-09-30	8881
2010-12-31	8613
2011-03-31	9832
2011-06-30	10254
2011-09-30	9505
2011-12-31	12521
2012-03-31	14492
2012-06-30	11450
2012-09-30	11339
2012-12-31	13103
2013-03-31	12937
2013-06-30	10138
2013-09-30	10951
2013-12-31	13942
2014-03-31	10214
2014-06-30	9270
2014-09-30	7666
2014-12-31	7685
2015-03-31	7033
2015-06-30	5988
2015-09-30	5515
2015-12-31	4141
2016-03-31	3300
2016-06-30	3580
2016-09-30	4731
2016-12-31	3527
2017-03-31	3875
2017-06-30	4128
2017-09-30	4643
2017-12-31	3109
2018-03-31	3842
2018-06-30	2962
2018-09-30	3394
2018-12-31	3843
2019-03-31	5025
2019-06-30	4284
2019-09-30	3748
2019-12-31	4478
2020-03-31	4777
2020-06-30	3559
2020-09-30	3003
2020-12-31	7689
2021-03-31	6226
2021-06-30	6100
2021-09-30	6289
2021-12-31	6498
2022-03-31	7286
2022-06-30	7705
2022-09-30	7572
2022-12-31	6033
2023-03-31	7155
2023-06-30	9693
2023-09-30	7643