Quarter	US dollars
1986-09-30	553
1986-12-31	632
1987-03-31	517
1987-06-30	618
1987-09-30	504
1987-12-31	590
1988-03-31	613
1988-06-30	728
1988-09-30	923
1988-12-31	1070
1989-03-31	1000
1989-06-30	1123
1989-09-30	1206
1989-12-31	1246
1990-03-31	1380
1990-06-30	1598
1990-09-30	1650
1990-12-31	1805
1991-03-31	1690
1991-06-30	1632
1991-09-30	1745
1991-12-31	1796
1992-03-31	1839
1992-06-30	2556
1992-09-30	2578
1992-12-31	1962
1993-03-31	2169
1993-06-30	2263
1993-09-30	2289
1993-12-31	2438
1994-03-31	2608
1994-06-30	3496
1994-09-30	2979
1994-12-31	3063
1995-03-31	2229
1995-06-30	2198
1995-09-30	2564
1995-12-31	2545
1996-03-31	3066
1996-06-30	3511
1996-09-30	3377
1996-12-31	3286
1997-03-31	4247
1997-06-30	4744
1997-09-30	4827
1997-12-31	4625
1998-03-31	5086
1998-06-30	5977
1998-09-30	5187
1998-12-31	5494
1999-03-31	7178
1999-06-30	7221
1999-09-30	6884
1999-12-31	4057
2000-03-31	6087
2000-06-30	5556
2000-09-30	4301
2000-12-31	3780
2001-03-31	3761
2001-06-30	5041
2001-09-30	3983
2001-12-31	3194
2002-03-31	4359
2002-06-30	4418
2002-09-30	5960
2002-12-31	2669
2003-03-31	9558
2003-06-30	5364
2003-09-30	7190
2003-12-31	3611
2004-03-31	8051
2004-06-30	4545
2004-09-30	5834
2004-12-31	6602
2005-03-31	11501
2005-06-30	7251
2005-09-30	11913
2005-12-31	4287
2006-03-31	9863
2006-06-30	7837
2006-09-30	13704
2006-12-31	6935
2007-03-31	14804
2007-06-30	12123
2007-09-30	23080
2007-12-31	15852
2008-03-31	29385
2008-06-30	16294
2008-09-30	13836
2008-12-31	8268
2009-03-31	6392
2009-06-30	6539
2009-09-30	10146
2009-12-31	14320
2010-03-31	16989
2010-06-30	15000
2010-09-30	15707
2010-12-31	15105
2011-03-31	20477
2011-06-30	24458
2011-09-30	25118
2011-12-31	24248
2012-03-31	27303
2012-06-30	24563
2012-09-30	24839
2012-12-31	23513
2013-03-31	41386
2013-06-30	48035
2013-09-30	46741
2013-12-31	48882
2014-03-31	63649
2014-06-30	58619
2014-09-30	54753
2014-12-31	42610
2015-03-31	46600
2015-06-30	46299
2015-09-30	41169
2015-12-31	36650
2016-03-31	35337
2016-06-30	37007
2016-09-30	33558
2016-12-31	38047
2017-03-31	40056
2017-06-30	49589
2017-09-30	56633
2017-12-31	61487
2018-03-31	55436
2018-06-30	45185
2018-09-30	56869
2018-12-31	58517
2019-03-31	63256
2019-06-30	61058
2019-09-30	51004
2019-12-31	54857
2020-03-31	57649
2020-06-30	48155
2020-09-30	48819
2020-12-31	54200
2021-03-31	56549
2021-06-30	55667
2021-09-30	58051
2021-12-31	57790
2022-03-31	49238
2022-06-30	49619
2022-09-30	51346
2022-12-31	55306
2023-03-31	55634
2023-06-30	49927
2023-09-30	51962