Quarter	US dollars
1986-09-30	22778
1986-12-31	18547
1987-03-31	18808
1987-06-30	19822
1987-09-30	20584
1987-12-31	22059
1988-03-31	20477
1988-06-30	20017
1988-09-30	17727
1988-12-31	16389
1989-03-31	17287
1989-06-30	18501
1989-09-30	16358
1989-12-31	16402
1990-03-31	16773
1990-06-30	14831
1990-09-30	15847
1990-12-31	14761
1991-03-31	13666
1991-06-30	13604
1991-09-30	13574
1991-12-31	14280
1992-03-31	14422
1992-06-30	14399
1992-09-30	11867
1992-12-31	11551
1993-03-31	11932
1993-06-30	11614
1993-09-30	12969
1993-12-31	20511
1994-03-31	14146
1994-06-30	15008
1994-09-30	17686
1994-12-31	17887
1995-03-31	15880
1995-06-30	13408
1995-09-30	15758
1995-12-31	14486
1996-03-31	16903
1996-06-30	16626
1996-09-30	17403
1996-12-31	17447
1997-03-31	15876
1997-06-30	15393
1997-09-30	18500
1997-12-31	21971
1998-03-31	18036
1998-06-30	17310
1998-09-30	17616
1998-12-31	18063
1999-03-31	15476
1999-06-30	16091
1999-09-30	12308
1999-12-31	22045
2000-03-31	12655
2000-06-30	13304
2000-09-30	13628
2000-12-31	13577
2001-03-31	11463
2001-06-30	12105
2001-09-30	12357
2001-12-31	22921
2002-03-31	14559
2002-06-30	14432
2002-09-30	17944
2002-12-31	15735
2003-03-31	15204
2003-06-30	23284
2003-09-30	24218
2003-12-31	28394
2004-03-31	34554
2004-06-30	27491
2004-09-30	39054
2004-12-31	26404
2005-03-31	18024
2005-06-30	43652
2005-09-30	31128
2005-12-31	36190
2006-03-31	46106
2006-06-30	21746
2006-09-30	40345
2006-12-31	40742
2007-03-31	66743
2007-06-30	56702
2007-09-30	38435
2007-12-31	45341
2008-03-31	97345
2008-06-30	50934
2008-09-30	52741
2008-12-31	79609
2009-03-31	112954
2009-06-30	76127
2009-09-30	30056
2009-12-31	29327
2010-03-31	28523
2010-06-30	25146
2010-09-30	28381
2010-12-31	26075
2011-03-31	26913
2011-06-30	31747
2011-09-30	256742
2011-12-31	250720
2012-03-31	202753
2012-06-30	19845
2012-09-30	23127
2012-12-31	21018
2013-03-31	21732
2013-06-30	19420
2013-09-30	19228
2013-12-31	20582
2014-03-31	21337
2014-06-30	22610
2014-09-30	24037
2014-12-31	26166
2015-03-31	27577
2015-06-30	25635
2015-09-30	27214
2015-12-31	26255
2016-03-31	26231
2016-06-30	25320
2016-09-30	22107
2016-12-31	19359
2017-03-31	22845
2017-06-30	19867
2017-09-30	21574
2017-12-31	22743
2018-03-31	23781
2018-06-30	24188
2018-09-30	23475
2018-12-31	22123
2019-03-31	21005
2019-06-30	21338
2019-09-30	19076
2019-12-31	20561
2020-03-31	19336
2020-06-30	16447
2020-09-30	16061
2020-12-31	15689
2021-03-31	18289
2021-06-30	17108
2021-09-30	15534
2021-12-31	14433
2022-03-31	14181
2022-06-30	14663
2022-09-30	16786
2022-12-31	9516
2023-03-31	9821
2023-06-30	8382
2023-09-30	8867