Quarter	US dollars
1986-09-30	4852
1986-12-31	5087
1987-03-31	5140
1987-06-30	5102
1987-09-30	5098
1987-12-31	5175
1988-03-31	5216
1988-06-30	5171
1988-09-30	5266
1988-12-31	5123
1989-03-31	4827
1989-06-30	4760
1989-09-30	4561
1989-12-31	4239
1990-03-31	3898
1990-06-30	3385
1990-09-30	3283
1990-12-31	3029
1991-03-31	2900
1991-06-30	2815
1991-09-30	2830
1991-12-31	2970
1992-03-31	3056
1992-06-30	2949
1992-09-30	3025
1992-12-31	3451
1993-03-31	3622
1993-06-30	3533
1993-09-30	3432
1993-12-31	4332
1994-03-31	4043
1994-06-30	4403
1994-09-30	5104
1994-12-31	5101
1995-03-31	4378
1995-06-30	4474
1995-09-30	4004
1995-12-31	4477
1996-03-31	4186
1996-06-30	4645
1996-09-30	4445
1996-12-31	4131
1997-03-31	5746
1997-06-30	5268
1997-09-30	6425
1997-12-31	5675
1998-03-31	5674
1998-06-30	4801
1998-09-30	4760
1998-12-31	5374
1999-03-31	5046
1999-06-30	5079
1999-09-30	4814
1999-12-31	5134
2000-03-31	4972
2000-06-30	5166
2000-09-30	4741
2000-12-31	4842
2001-03-31	4085
2001-06-30	4135
2001-09-30	3836
2001-12-31	3157
2002-03-31	2241
2002-06-30	2239
2002-09-30	2198
2002-12-31	1897
2003-03-31	1990
2003-06-30	2028
2003-09-30	2100
2003-12-31	2355
2004-03-31	2436
2004-06-30	2632
2004-09-30	2810
2004-12-31	2640
2005-03-31	2682
2005-06-30	2943
2005-09-30	3798
2005-12-31	3791
2006-03-31	4164
2006-06-30	4365
2006-09-30	4692
2006-12-31	4775
2007-03-31	4938
2007-06-30	6942
2007-09-30	6242
2007-12-31	6440
2008-03-31	6312
2008-06-30	6453
2008-09-30	5449
2008-12-31	3934
2009-03-31	4229
2009-06-30	3797
2009-09-30	3240
2009-12-31	3003
2010-03-31	3287
2010-06-30	2957
2010-09-30	3266
2010-12-31	2927
2011-03-31	3013
2011-06-30	2798
2011-09-30	2761
2011-12-31	2499
2012-03-31	2802
2012-06-30	2327
2012-09-30	2065
2012-12-31	1736
2013-03-31	1756
2013-06-30	1660
2013-09-30	1810
2013-12-31	1598
2014-03-31	1629
2014-06-30	1829
2014-09-30	1342
2014-12-31	1248
2015-03-31	1334
2015-06-30	1592
2015-09-30	1889
2015-12-31	1890
2016-03-31	3522
2016-06-30	3734
2016-09-30	2279
2016-12-31	1887
2017-03-31	2278
2017-06-30	2035
2017-09-30	3878
2017-12-31	4057
2018-03-31	4049
2018-06-30	3356
2018-09-30	4021
2018-12-31	4042
2019-03-31	3259
2019-06-30	2775
2019-09-30	1488
2019-12-31	1807
2020-03-31	1301
2020-06-30	821
2020-09-30	863
2020-12-31	675
2021-03-31	685
2021-06-30	723
2021-09-30	680
2021-12-31	623
2022-03-31	563
2022-06-30	473
2022-09-30	409
2022-12-31	380
2023-03-31	434
2023-06-30	410
2023-09-30	334