Quarter	US dollars
1986-09-30	6809
1986-12-31	6787
1987-03-31	5602
1987-06-30	6856
1987-09-30	6909
1987-12-31	8303
1988-03-31	7319
1988-06-30	7240
1988-09-30	7990
1988-12-31	6419
1989-03-31	7010
1989-06-30	7501
1989-09-30	6929
1989-12-31	8011
1990-03-31	7099
1990-06-30	7195
1990-09-30	7795
1990-12-31	7863
1991-03-31	6973
1991-06-30	5326
1991-09-30	5455
1991-12-31	5354
1992-03-31	6196
1992-06-30	6116
1992-09-30	7137
1992-12-31	8823
1993-03-31	6425
1993-06-30	8305
1993-09-30	7474
1993-12-31	6607
1994-03-31	7585
1994-06-30	7419
1994-09-30	9053
1994-12-31	8110
1995-03-31	7078
1995-06-30	7138
1995-09-30	6607
1995-12-31	6479
1996-03-31	6985
1996-06-30	6501
1996-09-30	6085
1996-12-31	6710
1997-03-31	8394
1997-06-30	8406
1997-09-30	7523
1997-12-31	8666
1998-03-31	7533
1998-06-30	7499
1998-09-30	8319
1998-12-31	9114
1999-03-31	10012
1999-06-30	9737
1999-09-30	9934
1999-12-31	9558
2000-03-31	9596
2000-06-30	11683
2000-09-30	11611
2000-12-31	10878
2001-03-31	9949
2001-06-30	9262
2001-09-30	13417
2001-12-31	10197
2002-03-31	12193
2002-06-30	14002
2002-09-30	12738
2002-12-31	12660
2003-03-31	13960
2003-06-30	12736
2003-09-30	12236
2003-12-31	13426
2004-03-31	12692
2004-06-30	15104
2004-09-30	16628
2004-12-31	17887
2005-03-31	16726
2005-06-30	16090
2005-09-30	16391
2005-12-31	18968
2006-03-31	20545
2006-06-30	20216
2006-09-30	21241
2006-12-31	19493
2007-03-31	16969
2007-06-30	22467
2007-09-30	25022
2007-12-31	28442
2008-03-31	27251
2008-06-30	32359
2008-09-30	27995
2008-12-31	29216
2009-03-31	25242
2009-06-30	26112
2009-09-30	23686
2009-12-31	21466
2010-03-31	27314
2010-06-30	24048
2010-09-30	20169
2010-12-31	22584
2011-03-31	27069
2011-06-30	25431
2011-09-30	24580
2011-12-31	24181
2012-03-31	22265
2012-06-30	21646
2012-09-30	21438
2012-12-31	9543
2013-03-31	12516
2013-06-30	12664
2013-09-30	12212
2013-12-31	12686
2014-03-31	14913
2014-06-30	14039
2014-09-30	13283
2014-12-31	13960
2015-03-31	13550
2015-06-30	12503
2015-09-30	7444
2015-12-31	6714
2016-03-31	5924
2016-06-30	6413
2016-09-30	6344
2016-12-31	6144
2017-03-31	6550
2017-06-30	6820
2017-09-30	8012
2017-12-31	7028
2018-03-31	6991
2018-06-30	6564
2018-09-30	6851
2018-12-31	6686
2019-03-31	7949
2019-06-30	8370
2019-09-30	7140
2019-12-31	7177
2020-03-31	8779
2020-06-30	8840
2020-09-30	8711
2020-12-31	7227
2021-03-31	8320
2021-06-30	7540
2021-09-30	8074
2021-12-31	7636
2022-03-31	7531
2022-06-30	7083
2022-09-30	5916
2022-12-31	7551
2023-03-31	6764
2023-06-30	8056
2023-09-30	8010