Quarter	US dollars
1986-09-30	25807
1986-12-31	30091
1987-03-31	31694
1987-06-30	30803
1987-09-30	28485
1987-12-31	35951
1988-03-31	36587
1988-06-30	35603
1988-09-30	35705
1988-12-31	39160
1989-03-31	40525
1989-06-30	44758
1989-09-30	46020
1989-12-31	51500
1990-03-31	56209
1990-06-30	63267
1990-09-30	70958
1990-12-31	78641
1991-03-31	76375
1991-06-30	73103
1991-09-30	78442
1991-12-31	85114
1992-03-31	86604
1992-06-30	92240
1992-09-30	98295
1992-12-31	90718
1993-03-31	89179
1993-06-30	86576
1993-09-30	86625
1993-12-31	87443
1994-03-31	90815
1994-06-30	93739
1994-09-30	95458
1994-12-31	99393
1995-03-31	100940
1995-06-30	100594
1995-09-30	99691
1995-12-31	100323
1996-03-31	105371
1996-06-30	110026
1996-09-30	111412
1996-12-31	116565
1997-03-31	112328
1997-06-30	108643
1997-09-30	117487
1997-12-31	117854
1998-03-31	136703
1998-06-30	148718
1998-09-30	149105
1998-12-31	131833
1999-03-31	115437
1999-06-30	118699
1999-09-30	130115
1999-12-31	124633
2000-03-31	128710
2000-06-30	133263
2000-09-30	122860
2000-12-31	136233
2001-03-31	144814
2001-06-30	145280
2001-09-30	143835
2001-12-31	136246
2002-03-31	124519
2002-06-30	134756
2002-09-30	132755
2002-12-31	145054
2003-03-31	154382
2003-06-30	170479
2003-09-30	179862
2003-12-31	179002
2004-03-31	175210
2004-06-30	170246
2004-09-30	172213
2004-12-31	180717
2005-03-31	175070
2005-06-30	174205
2005-09-30	172647
2005-12-31	158826
2006-03-31	170934
2006-06-30	174785
2006-09-30	177198
2006-12-31	184952
2007-03-31	201258
2007-06-30	223651
2007-09-30	224536
2007-12-31	226254
2008-03-31	225941
2008-06-30	239453
2008-09-30	227057
2008-12-31	181991
2009-03-31	189413
2009-06-30	206304
2009-09-30	202949
2009-12-31	201672
2010-03-31	178072
2010-06-30	159523
2010-09-30	166968
2010-12-31	171236
2011-03-31	190863
2011-06-30	200679
2011-09-30	151147
2011-12-31	131109
2012-03-31	147242
2012-06-30	143563
2012-09-30	138799
2012-12-31	144782
2013-03-31	130177
2013-06-30	126995
2013-09-30	124582
2013-12-31	110716
2014-03-31	117240
2014-06-30	121514
2014-09-30	120473
2014-12-31	104732
2015-03-31	94154
2015-06-30	87132
2015-09-30	88570
2015-12-31	87249
2016-03-31	90095
2016-06-30	76047
2016-09-30	64289
2016-12-31	64813
2017-03-31	58266
2017-06-30	68527
2017-09-30	66523
2017-12-31	63228
2018-03-31	67935
2018-06-30	66594
2018-09-30	64048
2018-12-31	69958
2019-03-31	55974
2019-06-30	54572
2019-09-30	54134
2019-12-31	50297
2020-03-31	51723
2020-06-30	52942
2020-09-30	54476
2020-12-31	58721
2021-03-31	43342
2021-06-30	39240
2021-09-30	40188
2021-12-31	40775
2022-03-31	31782
2022-06-30	29219
2022-09-30	25896
2022-12-31	27914
2023-03-31	27902
2023-06-30	29337
2023-09-30	29690