Quarter	US dollars
1986-09-30	2430
1986-12-31	2589
1987-03-31	2636
1987-06-30	2659
1987-09-30	2795
1987-12-31	3003
1988-03-31	2813
1988-06-30	2725
1988-09-30	2638
1988-12-31	2684
1989-03-31	2571
1989-06-30	2611
1989-09-30	2654
1989-12-31	2647
1990-03-31	2506
1990-06-30	2254
1990-09-30	2150
1990-12-31	2004
1991-03-31	1839
1991-06-30	1823
1991-09-30	1821
1991-12-31	1696
1992-03-31	1637
1992-06-30	1571
1992-09-30	1477
1992-12-31	1271
1993-03-31	1181
1993-06-30	1194
1993-09-30	1049
1993-12-31	1012
1994-03-31	949
1994-06-30	933
1994-09-30	1075
1994-12-31	1049
1995-03-31	1082
1995-06-30	1069
1995-09-30	1013
1995-12-31	1150
1996-03-31	1278
1996-06-30	1358
1996-09-30	1706
1996-12-31	2015
1997-03-31	2457
1997-06-30	2576
1997-09-30	2870
1997-12-31	2934
1998-03-31	3103
1998-06-30	3513
1998-09-30	2893
1998-12-31	2912
1999-03-31	2572
1999-06-30	2605
1999-09-30	2947
1999-12-31	2940
2000-03-31	3110
2000-06-30	3011
2000-09-30	3313
2000-12-31	3640
2001-03-31	2793
2001-06-30	3070
2001-09-30	3218
2001-12-31	3113
2002-03-31	3064
2002-06-30	2982
2002-09-30	3543
2002-12-31	3870
2003-03-31	3382
2003-06-30	2930
2003-09-30	3487
2003-12-31	3747
2004-03-31	4443
2004-06-30	4218
2004-09-30	4602
2004-12-31	4374
2005-03-31	4108
2005-06-30	4972
2005-09-30	4981
2005-12-31	4355
2006-03-31	4441
2006-06-30	4320
2006-09-30	3667
2006-12-31	5197
2007-03-31	5656
2007-06-30	6945
2007-09-30	7360
2007-12-31	6938
2008-03-31	7775
2008-06-30	7210
2008-09-30	8122
2008-12-31	7111
2009-03-31	5778
2009-06-30	6112
2009-09-30	6517
2009-12-31	7521
2010-03-31	6525
2010-06-30	7019
2010-09-30	7639
2010-12-31	6035
2011-03-31	5391
2011-06-30	5837
2011-09-30	5591
2011-12-31	5825
2012-03-31	4211
2012-06-30	6044
2012-09-30	4748
2012-12-31	3677
2013-03-31	4501
2013-06-30	3748
2013-09-30	3824
2013-12-31	3946
2014-03-31	4683
2014-06-30	3854
2014-09-30	4207
2014-12-31	4119
2015-03-31	5070
2015-06-30	4768
2015-09-30	4096
2015-12-31	3390
2016-03-31	3142
2016-06-30	3638
2016-09-30	3620
2016-12-31	2985
2017-03-31	2964
2017-06-30	3275
2017-09-30	3610
2017-12-31	3731
2018-03-31	3007
2018-06-30	2844
2018-09-30	2430
2018-12-31	2690
2019-03-31	2547
2019-06-30	2660
2019-09-30	3114
2019-12-31	2904
2020-03-31	2811
2020-06-30	2259
2020-09-30	2196
2020-12-31	2005
2021-03-31	1714
2021-06-30	1643
2021-09-30	1574
2021-12-31	1396
2022-03-31	1428
2022-06-30	1635
2022-09-30	1617
2022-12-31	1720
2023-03-31	2108
2023-06-30	2554
2023-09-30	3088