Quarter	US dollars
1986-09-30	4205
1986-12-31	3857
1987-03-31	3886
1987-06-30	4051
1987-09-30	4140
1987-12-31	4242
1988-03-31	3839
1988-06-30	3715
1988-09-30	3463
1988-12-31	3534
1989-03-31	3644
1989-06-30	3812
1989-09-30	3879
1989-12-31	3800
1990-03-31	3940
1990-06-30	4612
1990-09-30	4211
1990-12-31	3986
1991-03-31	3717
1991-06-30	3717
1991-09-30	3973
1991-12-31	4148
1992-03-31	3858
1992-06-30	4172
1992-09-30	4176
1992-12-31	3700
1993-03-31	3910
1993-06-30	4170
1993-09-30	4027
1993-12-31	4266
1994-03-31	4302
1994-06-30	4471
1994-09-30	5445
1994-12-31	5004
1995-03-31	6137
1995-06-30	6088
1995-09-30	6233
1995-12-31	6932
1996-03-31	7478
1996-06-30	8161
1996-09-30	7571
1996-12-31	7359
1997-03-31	7416
1997-06-30	7891
1997-09-30	7315
1997-12-31	7049
1998-03-31	8894
1998-06-30	9905
1998-09-30	9139
1998-12-31	12172
1999-03-31	11496
1999-06-30	10357
1999-09-30	11474
1999-12-31	12420
2000-03-31	11763
2000-06-30	13383
2000-09-30	12506
2000-12-31	15121
2001-03-31	14756
2001-06-30	15134
2001-09-30	16766
2001-12-31	19096
2002-03-31	18879
2002-06-30	21855
2002-09-30	21135
2002-12-31	24144
2003-03-31	24418
2003-06-30	27421
2003-09-30	30152
2003-12-31	32558
2004-03-31	31725
2004-06-30	30221
2004-09-30	28356
2004-12-31	30940
2005-03-31	29151
2005-06-30	29399
2005-09-30	28709
2005-12-31	29141
2006-03-31	27434
2006-06-30	29764
2006-09-30	31018
2006-12-31	31292
2007-03-31	27812
2007-06-30	29770
2007-09-30	32978
2007-12-31	33785
2008-03-31	39146
2008-06-30	43126
2008-09-30	35922
2008-12-31	27828
2009-03-31	29638
2009-06-30	28421
2009-09-30	31801
2009-12-31	42322
2010-03-31	43069
2010-06-30	37247
2010-09-30	43365
2010-12-31	36723
2011-03-31	42791
2011-06-30	46758
2011-09-30	45045
2011-12-31	41409
2012-03-31	43509
2012-06-30	44636
2012-09-30	43164
2012-12-31	43015
2013-03-31	40954
2013-06-30	41004
2013-09-30	26889
2013-12-31	28958
2014-03-31	28685
2014-06-30	28253
2014-09-30	24949
2014-12-31	24982
2015-03-31	21868
2015-06-30	21884
2015-09-30	14938
2015-12-31	14022
2016-03-31	15821
2016-06-30	15701
2016-09-30	14606
2016-12-31	11811
2017-03-31	11576
2017-06-30	12188
2017-09-30	10866
2017-12-31	8967
2018-03-31	8803
2018-06-30	7881
2018-09-30	6234
2018-12-31	4963
2019-03-31	3886
2019-06-30	4099
2019-09-30	3668
2019-12-31	3418
2020-03-31	3484
2020-06-30	2803
2020-09-30	2865
2020-12-31	2136
2021-03-31	1515
2021-06-30	1530
2021-09-30	983
2021-12-31	1828
2022-03-31	1322
2022-06-30	1989
2022-09-30	1168
2022-12-31	1749
2023-03-31	1354
2023-06-30	1452
2023-09-30	1087