Quarter	US dollars
1986-09-30	7324
1986-12-31	8122
1987-03-31	7718
1987-06-30	8291
1987-09-30	7199
1987-12-31	7968
1988-03-31	8042
1988-06-30	8154
1988-09-30	7914
1988-12-31	7750
1989-03-31	7889
1989-06-30	7895
1989-09-30	8125
1989-12-31	8049
1990-03-31	8085
1990-06-30	7494
1990-09-30	7918
1990-12-31	7695
1991-03-31	7567
1991-06-30	6728
1991-09-30	7219
1991-12-31	6553
1992-03-31	6633
1992-06-30	6861
1992-09-30	5993
1992-12-31	6066
1993-03-31	5093
1993-06-30	5237
1993-09-30	5620
1993-12-31	6409
1994-03-31	5949
1994-06-30	6030
1994-09-30	5244
1994-12-31	5673
1995-03-31	4181
1995-06-30	3862
1995-09-30	3872
1995-12-31	6544
1996-03-31	6493
1996-06-30	7061
1996-09-30	6756
1996-12-31	7438
1997-03-31	5904
1997-06-30	7297
1997-09-30	8424
1997-12-31	7772
1998-03-31	5608
1998-06-30	7925
1998-09-30	16048
1998-12-31	5908
1999-03-31	6104
1999-06-30	7478
1999-09-30	6610
1999-12-31	7564
2000-03-31	9107
2000-06-30	5792
2000-09-30	7410
2000-12-31	5449
2001-03-31	5582
2001-06-30	6358
2001-09-30	7012
2001-12-31	7710
2002-03-31	8061
2002-06-30	7427
2002-09-30	7985
2002-12-31	8484
2003-03-31	9302
2003-06-30	9981
2003-09-30	12433
2003-12-31	13680
2004-03-31	14373
2004-06-30	14817
2004-09-30	13859
2004-12-31	15592
2005-03-31	14342
2005-06-30	21417
2005-09-30	18614
2005-12-31	17589
2006-03-31	17550
2006-06-30	19776
2006-09-30	23419
2006-12-31	27952
2007-03-31	26991
2007-06-30	26162
2007-09-30	31275
2007-12-31	42413
2008-03-31	43560
2008-06-30	34120
2008-09-30	35412
2008-12-31	17395
2009-03-31	14896
2009-06-30	16932
2009-09-30	15805
2009-12-31	20610
2010-03-31	18550
2010-06-30	17163
2010-09-30	18241
2010-12-31	17082
2011-03-31	19633
2011-06-30	20609
2011-09-30	18030
2011-12-31	17883
2012-03-31	16649
2012-06-30	15042
2012-09-30	15520
2012-12-31	15639
2013-03-31	17350
2013-06-30	17698
2013-09-30	16973
2013-12-31	17542
2014-03-31	19843
2014-06-30	17569
2014-09-30	13445
2014-12-31	16206
2015-03-31	14535
2015-06-30	14990
2015-09-30	16351
2015-12-31	13249
2016-03-31	13675
2016-06-30	15076
2016-09-30	15192
2016-12-31	14928
2017-03-31	15189
2017-06-30	14827
2017-09-30	14280
2017-12-31	14361
2018-03-31	16450
2018-06-30	15603
2018-09-30	13111
2018-12-31	17030
2019-03-31	13271
2019-06-30	15711
2019-09-30	13182
2019-12-31	13358
2020-03-31	13077
2020-06-30	11500
2020-09-30	10695
2020-12-31	11806
2021-03-31	11548
2021-06-30	25256
2021-09-30	25520
2021-12-31	25462
2022-03-31	26891
2022-06-30	26359
2022-09-30	23912
2022-12-31	23927
2023-03-31	22213
2023-06-30	24001
2023-09-30	24099