Quarter	US dollars
1986-09-30	4612
1986-12-31	4701
1987-03-31	4560
1987-06-30	4432
1987-09-30	5001
1987-12-31	5757
1988-03-31	5631
1988-06-30	6686
1988-09-30	6621
1988-12-31	6199
1989-03-31	5626
1989-06-30	5836
1989-09-30	6672
1989-12-31	7204
1990-03-31	7489
1990-06-30	8766
1990-09-30	10883
1990-12-31	11923
1991-03-31	9604
1991-06-30	10027
1991-09-30	11498
1991-12-31	12421
1992-03-31	11977
1992-06-30	11518
1992-09-30	13979
1992-12-31	12814
1993-03-31	14377
1993-06-30	14252
1993-09-30	13828
1993-12-31	14047
1994-03-31	12451
1994-06-30	13329
1994-09-30	14180
1994-12-31	16012
1995-03-31	15960
1995-06-30	16427
1995-09-30	15834
1995-12-31	16253
1996-03-31	16923
1996-06-30	17167
1996-09-30	20586
1996-12-31	19955
1997-03-31	22377
1997-06-30	22463
1997-09-30	26010
1997-12-31	23735
1998-03-31	25759
1998-06-30	23702
1998-09-30	28554
1998-12-31	25785
1999-03-31	23179
1999-06-30	23158
1999-09-30	31158
1999-12-31	30103
2000-03-31	33925
2000-06-30	35095
2000-09-30	34389
2000-12-31	37021
2001-03-31	38609
2001-06-30	37657
2001-09-30	42126
2001-12-31	40822
2002-03-31	42593
2002-06-30	47090
2002-09-30	51247
2002-12-31	53415
2003-03-31	59220
2003-06-30	69872
2003-09-30	73253
2003-12-31	86301
2004-03-31	92995
2004-06-30	95389
2004-09-30	95357
2004-12-31	108215
2005-03-31	111325
2005-06-30	109268
2005-09-30	123432
2005-12-31	140978
2006-03-31	130366
2006-06-30	144033
2006-09-30	155957
2006-12-31	185070
2007-03-31	194467
2007-06-30	211041
2007-09-30	213871
2007-12-31	254349
2008-03-31	290006
2008-06-30	302875
2008-09-30	288240
2008-12-31	259113
2009-03-31	265880
2009-06-30	277093
2009-09-30	263906
2009-12-31	250305
2010-03-31	258155
2010-06-30	264344
2010-09-30	293096
2010-12-31	256992
2011-03-31	276484
2011-06-30	284721
2011-09-30	274972
2011-12-31	259291
2012-03-31	261608
2012-06-30	267277
2012-09-30	272361
2012-12-31	261433
2013-03-31	257650
2013-06-30	244574
2013-09-30	249209
2013-12-31	250753
2014-03-31	252762
2014-06-30	240736
2014-09-30	228904
2014-12-31	226643
2015-03-31	214789
2015-06-30	221513
2015-09-30	198408
2015-12-31	218297
2016-03-31	227696
2016-06-30	206926
2016-09-30	196678
2016-12-31	181617
2017-03-31	178033
2017-06-30	184571
2017-09-30	193842
2017-12-31	199432
2018-03-31	210243
2018-06-30	209543
2018-09-30	213246
2018-12-31	215465
2019-03-31	204774
2019-06-30	200727
2019-09-30	202265
2019-12-31	215166
2020-03-31	207543
2020-06-30	219397
2020-09-30	226574
2020-12-31	251266
2021-03-31	234449
2021-06-30	239929
2021-09-30	234707
2021-12-31	228640
2022-03-31	211909
2022-06-30	198384
2022-09-30	195199
2022-12-31	196640
2023-03-31	198773
2023-06-30	199000
2023-09-30	188569