Quarter	US dollars
1986-09-30	8927
1986-12-31	10864
1987-03-31	13067
1987-06-30	15058
1987-09-30	15956
1987-12-31	17717
1988-03-31	13995
1988-06-30	12026
1988-09-30	11759
1988-12-31	11661
1989-03-31	11050
1989-06-30	10012
1989-09-30	10577
1989-12-31	11224
1990-03-31	11158
1990-06-30	10884
1990-09-30	11357
1990-12-31	11732
1991-03-31	10575
1991-06-30	10183
1991-09-30	9706
1991-12-31	9108
1992-03-31	8313
1992-06-30	8312
1992-09-30	7987
1992-12-31	6861
1993-03-31	6426
1993-06-30	6927
1993-09-30	5384
1993-12-31	4884
1994-03-31	5665
1994-06-30	5706
1994-09-30	5848
1994-12-31	5491
1995-03-31	5522
1995-06-30	4285
1995-09-30	3684
1995-12-31	3392
1996-03-31	2959
1996-06-30	3095
1996-09-30	2841
1996-12-31	2739
1997-03-31	2636
1997-06-30	2358
1997-09-30	3006
1997-12-31	3014
1998-03-31	2911
1998-06-30	2335
1998-09-30	2448
1998-12-31	2601
1999-03-31	2175
1999-06-30	2244
1999-09-30	2317
1999-12-31	3406
2000-03-31	2533
2000-06-30	2338
2000-09-30	3137
2000-12-31	2994
2001-03-31	3611
2001-06-30	5552
2001-09-30	4603
2001-12-31	4205
2002-03-31	4479
2002-06-30	4294
2002-09-30	3440
2002-12-31	3286
2003-03-31	3894
2003-06-30	5107
2003-09-30	5722
2003-12-31	9493
2004-03-31	10290
2004-06-30	12346
2004-09-30	14211
2004-12-31	14977
2005-03-31	15689
2005-06-30	9823
2005-09-30	12480
2005-12-31	12772
2006-03-31	14689
2006-06-30	12117
2006-09-30	10237
2006-12-31	10209
2007-03-31	13228
2007-06-30	20191
2007-09-30	17387
2007-12-31	21020
2008-03-31	21741
2008-06-30	16284
2008-09-30	10809
2008-12-31	9563
2009-03-31	10120
2009-06-30	11625
2009-09-30	8773
2009-12-31	6845
2010-03-31	8564
2010-06-30	8507
2010-09-30	7946
2010-12-31	8325
2011-03-31	10388
2011-06-30	7494
2011-09-30	6909
2011-12-31	7005
2012-03-31	5909
2012-06-30	5554
2012-09-30	6199
2012-12-31	7557
2013-03-31	5628
2013-06-30	5895
2013-09-30	6108
2013-12-31	7932
2014-03-31	10974
2014-06-30	11539
2014-09-30	12648
2014-12-31	12777
2015-03-31	13738
2015-06-30	9257
2015-09-30	11061
2015-12-31	10743
2016-03-31	14081
2016-06-30	13667
2016-09-30	17403
2016-12-31	10472
2017-03-31	14284
2017-06-30	14682
2017-09-30	14752
2017-12-31	15647
2018-03-31	14551
2018-06-30	15375
2018-09-30	13943
2018-12-31	13655
2019-03-31	15752
2019-06-30	19339
2019-09-30	16527
2019-12-31	13965
2020-03-31	20043
2020-06-30	18151
2020-09-30	22545
2020-12-31	18353
2021-03-31	18068
2021-06-30	16263
2021-09-30	15824
2021-12-31	16079
2022-03-31	21057
2022-06-30	19102
2022-09-30	19213
2022-12-31	18780
2023-03-31	19749
2023-06-30	19918
2023-09-30	17326