Quarter	US dollars
1986-09-30	3764
1986-12-31	4113
1987-03-31	4136
1987-06-30	4176
1987-09-30	4121
1987-12-31	4587
1988-03-31	4412
1988-06-30	4131
1988-09-30	4009
1988-12-31	4036
1989-03-31	3803
1989-06-30	3392
1989-09-30	3510
1989-12-31	3079
1990-03-31	2983
1990-06-30	2804
1990-09-30	2694
1990-12-31	2347
1991-03-31	2132
1991-06-30	1919
1991-09-30	1849
1991-12-31	1727
1992-03-31	1351
1992-06-30	1362
1992-09-30	1410
1992-12-31	1192
1993-03-31	1016
1993-06-30	922
1993-09-30	882
1993-12-31	1002
1994-03-31	740
1994-06-30	654
1994-09-30	536
1994-12-31	518
1995-03-31	417
1995-06-30	472
1995-09-30	378
1995-12-31	402
1996-03-31	392
1996-06-30	323
1996-09-30	347
1996-12-31	417
1997-03-31	383
1997-06-30	251
1997-09-30	256
1997-12-31	266
1998-03-31	231
1998-06-30	200
1998-09-30	225
1998-12-31	507
1999-03-31	466
1999-06-30	446
1999-09-30	477
1999-12-31	260
2000-03-31	269
2000-06-30	287
2000-09-30	217
2000-12-31	275
2001-03-31	241
2001-06-30	232
2001-09-30	298
2001-12-31	345
2002-03-31	416
2002-06-30	400
2002-09-30	471
2002-12-31	472
2003-03-31	457
2003-06-30	609
2003-09-30	639
2003-12-31	911
2004-03-31	920
2004-06-30	1050
2004-09-30	1087
2004-12-31	1218
2005-03-31	1382
2005-06-30	1377
2005-09-30	1367
2005-12-31	1289
2006-03-31	1766
2006-06-30	2257
2006-09-30	2708
2006-12-31	2777
2007-03-31	2532
2007-06-30	3086
2007-09-30	3182
2007-12-31	4732
2008-03-31	6327
2008-06-30	8055
2008-09-30	9230
2008-12-31	6210
2009-03-31	3366
2009-06-30	3474
2009-09-30	3770
2009-12-31	3705
2010-03-31	3924
2010-06-30	3821
2010-09-30	3503
2010-12-31	3192
2011-03-31	3446
2011-06-30	3813
2011-09-30	3275
2011-12-31	3052
2012-03-31	3309
2012-06-30	3962
2012-09-30	4561
2012-12-31	5417
2013-03-31	5571
2013-06-30	5545
2013-09-30	5593
2013-12-31	5904
2014-03-31	6603
2014-06-30	8619
2014-09-30	9600
2014-12-31	9341
2015-03-31	10755
2015-06-30	10256
2015-09-30	9874
2015-12-31	8913
2016-03-31	8080
2016-06-30	6751
2016-09-30	6181
2016-12-31	7249
2017-03-31	7450
2017-06-30	7313
2017-09-30	9203
2017-12-31	9540
2018-03-31	13774
2018-06-30	13804
2018-09-30	14057
2018-12-31	14600
2019-03-31	16362
2019-06-30	17896
2019-09-30	17750
2019-12-31	17432
2020-03-31	17644
2020-06-30	17096
2020-09-30	16445
2020-12-31	18454
2021-03-31	18106
2021-06-30	17718
2021-09-30	18175
2021-12-31	17514
2022-03-31	17530
2022-06-30	17563
2022-09-30	18646
2022-12-31	18512
2023-03-31	19085
2023-06-30	18158
2023-09-30	18029