Quarter	US dollars
1986-09-30	2051
1986-12-31	2345
1987-03-31	2920
1987-06-30	5577
1987-09-30	5818
1987-12-31	5063
1988-03-31	4362
1988-06-30	4126
1988-09-30	2886
1988-12-31	2726
1989-03-31	2452
1989-06-30	1180
1989-09-30	1597
1989-12-31	1617
1990-03-31	1510
1990-06-30	2331
1990-09-30	2374
1990-12-31	2637
1991-03-31	2565
1991-06-30	3421
1991-09-30	2828
1991-12-31	2494
1992-03-31	2422
1992-06-30	2198
1992-09-30	2798
1992-12-31	3091
1993-03-31	2224
1993-06-30	2768
1993-09-30	1639
1993-12-31	2344
1994-03-31	2852
1994-06-30	1951
1994-09-30	1934
1994-12-31	2687
1995-03-31	1497
1995-06-30	1226
1995-09-30	1731
1995-12-31	1409
1996-03-31	1702
1996-06-30	2592
1996-09-30	2713
1996-12-31	2416
1997-03-31	2888
1997-06-30	3459
1997-09-30	2095
1997-12-31	3109
1998-03-31	4108
1998-06-30	4441
1998-09-30	4221
1998-12-31	3477
1999-03-31	3403
1999-06-30	3673
1999-09-30	4398
1999-12-31	5107
2000-03-31	5029
2000-06-30	4978
2000-09-30	5384
2000-12-31	5618
2001-03-31	6378
2001-06-30	6822
2001-09-30	6741
2001-12-31	6483
2002-03-31	2742
2002-06-30	2329
2002-09-30	2561
2002-12-31	3328
2003-03-31	4094
2003-06-30	5104
2003-09-30	4665
2003-12-31	3915
2004-03-31	3686
2004-06-30	3849
2004-09-30	4448
2004-12-31	3935
2005-03-31	4111
2005-06-30	3568
2005-09-30	5434
2005-12-31	4654
2006-03-31	5890
2006-06-30	5502
2006-09-30	5664
2006-12-31	3926
2007-03-31	3646
2007-06-30	4123
2007-09-30	5334
2007-12-31	5691
2008-03-31	4830
2008-06-30	4581
2008-09-30	6412
2008-12-31	4828
2009-03-31	2213
2009-06-30	2651
2009-09-30	2361
2009-12-31	1880
2010-03-31	2058
2010-06-30	3233
2010-09-30	3951
2010-12-31	4812
2011-03-31	2628
2011-06-30	1555
2011-09-30	3294
2011-12-31	3711
2012-03-31	4224
2012-06-30	2438
2012-09-30	2562
2012-12-31	1860
2013-03-31	1572
2013-06-30	2732
2013-09-30	2623
2013-12-31	2808
2014-03-31	2377
2014-06-30	3000
2014-09-30	3758
2014-12-31	3844
2015-03-31	4999
2015-06-30	4844
2015-09-30	4767
2015-12-31	5322
2016-03-31	5679
2016-06-30	6537
2016-09-30	7242
2016-12-31	7231
2017-03-31	7653
2017-06-30	6336
2017-09-30	6712
2017-12-31	6398
2018-03-31	7056
2018-06-30	7411
2018-09-30	5324
2018-12-31	4595
2019-03-31	4463
2019-06-30	4677
2019-09-30	5717
2019-12-31	4949
2020-03-31	8446
2020-06-30	7205
2020-09-30	7279
2020-12-31	8153
2021-03-31	7366
2021-06-30	8777
2021-09-30	9315
2021-12-31	9995
2022-03-31	11210
2022-06-30	9881
2022-09-30	12174
2022-12-31	11362
2023-03-31	16388
2023-06-30	14998
2023-09-30	14630