Quarter	US dollars
1986-09-30	6546
1986-12-31	7426
1987-03-31	6193
1987-06-30	6075
1987-09-30	7256
1987-12-31	8359
1988-03-31	7265
1988-06-30	6948
1988-09-30	7570
1988-12-31	7296
1989-03-31	7917
1989-06-30	8351
1989-09-30	7589
1989-12-31	7832
1990-03-31	8616
1990-06-30	7595
1990-09-30	8266
1990-12-31	8812
1991-03-31	6351
1991-06-30	5593
1991-09-30	6292
1991-12-31	5887
1992-03-31	6801
1992-06-30	8743
1992-09-30	8259
1992-12-31	9248
1993-03-31	7515
1993-06-30	7624
1993-09-30	6095
1993-12-31	6005
1994-03-31	7376
1994-06-30	8615
1994-09-30	9337
1994-12-31	8467
1995-03-31	7845
1995-06-30	7880
1995-09-30	6287
1995-12-31	5494
1996-03-31	4413
1996-06-30	5308
1996-09-30	4872
1996-12-31	6272
1997-03-31	5614
1997-06-30	6411
1997-09-30	6291
1997-12-31	7609
1998-03-31	5849
1998-06-30	6177
1998-09-30	6599
1998-12-31	9388
1999-03-31	7215
1999-06-30	6255
1999-09-30	8398
1999-12-31	6121
2000-03-31	7302
2000-06-30	8431
2000-09-30	7623
2000-12-31	7816
2001-03-31	7491
2001-06-30	9439
2001-09-30	12187
2001-12-31	11195
2002-03-31	10267
2002-06-30	11521
2002-09-30	12038
2002-12-31	11862
2003-03-31	11293
2003-06-30	11048
2003-09-30	7997
2003-12-31	8905
2004-03-31	9285
2004-06-30	10567
2004-09-30	10975
2004-12-31	13711
2005-03-31	11670
2005-06-30	9616
2005-09-30	8315
2005-12-31	10356
2006-03-31	10862
2006-06-30	11217
2006-09-30	11980
2006-12-31	12497
2007-03-31	15191
2007-06-30	15660
2007-09-30	13990
2007-12-31	16932
2008-03-31	14489
2008-06-30	16050
2008-09-30	11881
2008-12-31	13945
2009-03-31	9035
2009-06-30	9130
2009-09-30	8493
2009-12-31	5608
2010-03-31	7991
2010-06-30	6522
2010-09-30	7134
2010-12-31	7873
2011-03-31	9725
2011-06-30	7118
2011-09-30	6904
2011-12-31	7638
2012-03-31	7711
2012-06-30	5901
2012-09-30	6882
2012-12-31	4820
2013-03-31	6300
2013-06-30	5403
2013-09-30	6072
2013-12-31	6470
2014-03-31	5002
2014-06-30	4959
2014-09-30	4814
2014-12-31	4341
2015-03-31	3565
2015-06-30	3222
2015-09-30	3562
2015-12-31	3546
2016-03-31	3678
2016-06-30	3590
2016-09-30	3580
2016-12-31	4164
2017-03-31	4395
2017-06-30	4207
2017-09-30	4638
2017-12-31	4320
2018-03-31	4927
2018-06-30	5299
2018-09-30	5410
2018-12-31	3919
2019-03-31	4647
2019-06-30	5425
2019-09-30	5667
2019-12-31	6495
2020-03-31	5219
2020-06-30	4276
2020-09-30	4570
2020-12-31	4067
2021-03-31	4907
2021-06-30	4420
2021-09-30	5012
2021-12-31	4809
2022-03-31	5001
2022-06-30	5497
2022-09-30	5598
2022-12-31	5210
2023-03-31	6284
2023-06-30	7355
2023-09-30	6828