Quarter	US dollars
1986-09-30	2973
1986-12-31	3341
1987-03-31	3467
1987-06-30	3528
1987-09-30	3296
1987-12-31	3437
1988-03-31	3388
1988-06-30	3141
1988-09-30	2975
1988-12-31	3280
1989-03-31	3443
1989-06-30	3674
1989-09-30	3776
1989-12-31	3722
1990-03-31	3589
1990-06-30	3640
1990-09-30	3751
1990-12-31	3763
1991-03-31	3099
1991-06-30	3298
1991-09-30	3065
1991-12-31	3201
1992-03-31	3280
1992-06-30	3364
1992-09-30	3534
1992-12-31	3549
1993-03-31	3237
1993-06-30	2961
1993-09-30	2950
1993-12-31	2828
1994-03-31	3193
1994-06-30	3299
1994-09-30	3458
1994-12-31	4041
1995-03-31	3863
1995-06-30	3243
1995-09-30	3364
1995-12-31	3807
1996-03-31	3987
1996-06-30	4237
1996-09-30	3646
1996-12-31	4703
1997-03-31	4297
1997-06-30	3524
1997-09-30	4587
1997-12-31	3704
1998-03-31	3739
1998-06-30	4070
1998-09-30	4115
1998-12-31	3923
1999-03-31	4073
1999-06-30	4869
1999-09-30	4110
1999-12-31	4954
2000-03-31	4746
2000-06-30	5012
2000-09-30	4706
2000-12-31	4879
2001-03-31	5308
2001-06-30	5380
2001-09-30	6443
2001-12-31	7117
2002-03-31	7337
2002-06-30	6109
2002-09-30	5010
2002-12-31	7517
2003-03-31	7493
2003-06-30	9962
2003-09-30	7540
2003-12-31	7790
2004-03-31	6992
2004-06-30	7054
2004-09-30	9443
2004-12-31	8283
2005-03-31	11298
2005-06-30	10716
2005-09-30	9966
2005-12-31	9678
2006-03-31	10991
2006-06-30	10706
2006-09-30	12695
2006-12-31	13823
2007-03-31	13598
2007-06-30	14511
2007-09-30	12955
2007-12-31	12267
2008-03-31	14464
2008-06-30	13476
2008-09-30	9957
2008-12-31	6420
2009-03-31	6629
2009-06-30	7704
2009-09-30	6118
2009-12-31	6526
2010-03-31	7212
2010-06-30	6392
2010-09-30	4758
2010-12-31	5180
2011-03-31	5573
2011-06-30	4551
2011-09-30	5014
2011-12-31	5996
2012-03-31	6163
2012-06-30	7963
2012-09-30	5251
2012-12-31	5651
2013-03-31	4852
2013-06-30	5134
2013-09-30	7504
2013-12-31	5600
2014-03-31	5329
2014-06-30	4776
2014-09-30	5618
2014-12-31	6396
2015-03-31	5635
2015-06-30	5356
2015-09-30	5565
2015-12-31	4875
2016-03-31	5751
2016-06-30	5466
2016-09-30	5448
2016-12-31	6224
2017-03-31	6453
2017-06-30	7373
2017-09-30	7045
2017-12-31	8332
2018-03-31	6657
2018-06-30	6322
2018-09-30	5793
2018-12-31	6483
2019-03-31	6669
2019-06-30	8236
2019-09-30	6324
2019-12-31	7284
2020-03-31	10216
2020-06-30	7568
2020-09-30	7555
2020-12-31	7819
2021-03-31	11974
2021-06-30	8571
2021-09-30	9056
2021-12-31	8885
2022-03-31	8773
2022-06-30	10933
2022-09-30	10369
2022-12-31	12618
2023-03-31	14480
2023-06-30	10373
2023-09-30	10865