Quarter	US dollars
1986-09-30	12083
1986-12-31	11654
1987-03-31	12024
1987-06-30	13768
1987-09-30	16120
1987-12-31	18133
1988-03-31	16702
1988-06-30	16147
1988-09-30	15397
1988-12-31	15057
1989-03-31	14607
1989-06-30	15018
1989-09-30	14476
1989-12-31	12671
1990-03-31	12932
1990-06-30	13286
1990-09-30	12626
1990-12-31	11156
1991-03-31	11677
1991-06-30	9894
1991-09-30	10595
1991-12-31	11343
1992-03-31	9393
1992-06-30	10753
1992-09-30	16014
1992-12-31	20819
1993-03-31	21126
1993-06-30	26175
1993-09-30	24838
1993-12-31	26301
1994-03-31	23515
1994-06-30	24514
1994-09-30	26137
1994-12-31	28356
1995-03-31	33747
1995-06-30	34980
1995-09-30	35228
1995-12-31	44200
1996-03-31	42895
1996-06-30	43101
1996-09-30	44117
1996-12-31	44743
1997-03-31	38925
1997-06-30	33975
1997-09-30	36814
1997-12-31	38284
1998-03-31	43381
1998-06-30	48410
1998-09-30	55071
1998-12-31	42947
1999-03-31	39313
1999-06-30	31222
1999-09-30	29436
1999-12-31	22429
2000-03-31	24305
2000-06-30	22886
2000-09-30	22171
2000-12-31	20196
2001-03-31	28734
2001-06-30	24954
2001-09-30	26877
2001-12-31	24474
2002-03-31	23588
2002-06-30	27759
2002-09-30	25726
2002-12-31	30648
2003-03-31	31272
2003-06-30	34928
2003-09-30	32256
2003-12-31	37138
2004-03-31	41845
2004-06-30	40139
2004-09-30	44169
2004-12-31	46274
2005-03-31	57268
2005-06-30	53351
2005-09-30	56901
2005-12-31	45936
2006-03-31	52575
2006-06-30	58768
2006-09-30	59207
2006-12-31	70466
2007-03-31	78767
2007-06-30	92844
2007-09-30	106704
2007-12-31	97841
2008-03-31	106377
2008-06-30	106618
2008-09-30	92512
2008-12-31	76965
2009-03-31	86423
2009-06-30	81180
2009-09-30	72273
2009-12-31	91231
2010-03-31	93840
2010-06-30	85359
2010-09-30	95080
2010-12-31	92617
2011-03-31	100786
2011-06-30	106012
2011-09-30	96780
2011-12-31	94136
2012-03-31	123846
2012-06-30	129539
2012-09-30	127042
2012-12-31	139911
2013-03-31	133610
2013-06-30	123202
2013-09-30	74771
2013-12-31	70858
2014-03-31	73383
2014-06-30	85240
2014-09-30	72738
2014-12-31	43844
2015-03-31	41117
2015-06-30	37717
2015-09-30	34981
2015-12-31	28821
2016-03-31	29663
2016-06-30	32003
2016-09-30	31179
2016-12-31	24410
2017-03-31	27523
2017-06-30	29331
2017-09-30	27295
2017-12-31	29859
2018-03-31	29135
2018-06-30	34251
2018-09-30	38113
2018-12-31	36953
2019-03-31	35766
2019-06-30	40459
2019-09-30	40672
2019-12-31	40824
2020-03-31	45043
2020-06-30	45964
2020-09-30	49265
2020-12-31	44671
2021-03-31	43058
2021-06-30	43460
2021-09-30	42813
2021-12-31	43791
2022-03-31	46124
2022-06-30	44362
2022-09-30	44565
2022-12-31	44201
2023-03-31	39872
2023-06-30	42864
2023-09-30	40952