Quarter	US dollars
1986-09-30	1693
1986-12-31	1479
1987-03-31	1572
1987-06-30	1744
1987-09-30	2111
1987-12-31	2085
1988-03-31	2155
1988-06-30	2014
1988-09-30	2586
1988-12-31	3036
1989-03-31	3325
1989-06-30	3344
1989-09-30	3893
1989-12-31	4059
1990-03-31	3899
1990-06-30	3852
1990-09-30	4168
1990-12-31	4130
1991-03-31	3293
1991-06-30	3597
1991-09-30	3251
1991-12-31	3191
1992-03-31	4109
1992-06-30	4839
1992-09-30	6105
1992-12-31	3700
1993-03-31	5439
1993-06-30	5822
1993-09-30	6219
1993-12-31	5035
1994-03-31	5812
1994-06-30	6255
1994-09-30	6857
1994-12-31	6716
1995-03-31	8019
1995-06-30	7760
1995-09-30	9474
1995-12-31	8425
1996-03-31	9922
1996-06-30	9454
1996-09-30	8632
1996-12-31	7721
1997-03-31	8105
1997-06-30	7817
1997-09-30	10014
1997-12-31	7629
1998-03-31	6856
1998-06-30	7054
1998-09-30	6401
1998-12-31	4515
1999-03-31	4786
1999-06-30	4434
1999-09-30	4577
1999-12-31	5622
2000-03-31	5979
2000-06-30	3441
2000-09-30	3186
2000-12-31	4678
2001-03-31	6088
2001-06-30	6578
2001-09-30	6962
2001-12-31	5021
2002-03-31	5418
2002-06-30	6454
2002-09-30	7643
2002-12-31	8419
2003-03-31	8876
2003-06-30	9107
2003-09-30	10012
2003-12-31	10066
2004-03-31	11520
2004-06-30	10431
2004-09-30	11088
2004-12-31	12878
2005-03-31	10956
2005-06-30	12367
2005-09-30	10488
2005-12-31	13085
2006-03-31	13045
2006-06-30	16209
2006-09-30	14400
2006-12-31	15730
2007-03-31	15222
2007-06-30	19664
2007-09-30	22536
2007-12-31	18146
2008-03-31	20363
2008-06-30	22808
2008-09-30	20489
2008-12-31	12274
2009-03-31	12080
2009-06-30	12188
2009-09-30	14867
2009-12-31	19863
2010-03-31	20296
2010-06-30	19534
2010-09-30	22099
2010-12-31	20251
2011-03-31	22249
2011-06-30	26876
2011-09-30	27240
2011-12-31	25041
2012-03-31	28638
2012-06-30	30887
2012-09-30	30205
2012-12-31	32406
2013-03-31	30156
2013-06-30	31331
2013-09-30	21609
2013-12-31	19874
2014-03-31	20231
2014-06-30	20540
2014-09-30	20030
2014-12-31	19559
2015-03-31	15764
2015-06-30	16684
2015-09-30	11285
2015-12-31	12045
2016-03-31	9907
2016-06-30	9645
2016-09-30	9587
2016-12-31	7896
2017-03-31	7619
2017-06-30	6824
2017-09-30	5554
2017-12-31	5628
2018-03-31	5278
2018-06-30	5555
2018-09-30	4480
2018-12-31	4405
2019-03-31	3036
2019-06-30	2868
2019-09-30	2419
2019-12-31	2555
2020-03-31	2697
2020-06-30	2797
2020-09-30	2884
2020-12-31	2101
2021-03-31	2297
2021-06-30	1969
2021-09-30	1933
2021-12-31	1389
2022-03-31	1517
2022-06-30	1619
2022-09-30	1375
2022-12-31	1607
2023-03-31	1878
2023-06-30	1948
2023-09-30	1949