Quarter	US dollars
1986-09-30	18340
1986-12-31	18248
1987-03-31	19439
1987-06-30	19650
1987-09-30	20289
1987-12-31	24098
1988-03-31	24131
1988-06-30	22529
1988-09-30	21968
1988-12-31	22782
1989-03-31	23364
1989-06-30	23316
1989-09-30	25061
1989-12-31	25636
1990-03-31	25631
1990-06-30	27270
1990-09-30	27262
1990-12-31	25187
1991-03-31	24636
1991-06-30	21381
1991-09-30	22182
1991-12-31	20788
1992-03-31	18371
1992-06-30	20717
1992-09-30	23795
1992-12-31	25591
1993-03-31	23822
1993-06-30	22907
1993-09-30	20680
1993-12-31	21112
1994-03-31	23478
1994-06-30	24510
1994-09-30	24275
1994-12-31	23905
1995-03-31	25063
1995-06-30	28335
1995-09-30	28517
1995-12-31	31896
1996-03-31	33576
1996-06-30	35842
1996-09-30	34107
1996-12-31	38150
1997-03-31	43424
1997-06-30	41875
1997-09-30	48053
1997-12-31	58434
1998-03-31	53764
1998-06-30	58074
1998-09-30	64264
1998-12-31	59442
1999-03-31	63397
1999-06-30	53640
1999-09-30	50212
1999-12-31	56911
2000-03-31	55138
2000-06-30	64738
2000-09-30	71129
2000-12-31	62980
2001-03-31	82984
2001-06-30	89145
2001-09-30	94548
2001-12-31	74854
2002-03-31	100188
2002-06-30	105783
2002-09-30	102260
2002-12-31	90875
2003-03-31	89500
2003-06-30	95802
2003-09-30	106353
2003-12-31	122224
2004-03-31	128942
2004-06-30	136617
2004-09-30	142910
2004-12-31	169438
2005-03-31	189097
2005-06-30	218547
2005-09-30	222686
2005-12-31	228537
2006-03-31	221932
2006-06-30	266484
2006-09-30	249281
2006-12-31	280222
2007-03-31	283416
2007-06-30	304971
2007-09-30	345887
2007-12-31	372239
2008-03-31	365812
2008-06-30	321023
2008-09-30	322937
2008-12-31	240234
2009-03-31	297449
2009-06-30	243566
2009-09-30	253332
2009-12-31	307601
2010-03-31	279737
2010-06-30	248418
2010-09-30	260661
2010-12-31	265683
2011-03-31	270945
2011-06-30	270816
2011-09-30	250116
2011-12-31	268868
2012-03-31	255414
2012-06-30	244476
2012-09-30	235915
2012-12-31	236863
2013-03-31	233267
2013-06-30	224956
2013-09-30	234032
2013-12-31	251717
2014-03-31	278547
2014-06-30	314578
2014-09-30	321066
2014-12-31	285306
2015-03-31	270648
2015-06-30	263343
2015-09-30	259212
2015-12-31	231058
2016-03-31	237919
2016-06-30	261540
2016-09-30	266891
2016-12-31	259322
2017-03-31	260628
2017-06-30	238844
2017-09-30	252025
2017-12-31	261322
2018-03-31	261351
2018-06-30	244321
2018-09-30	240184
2018-12-31	226339
2019-03-31	245706
2019-06-30	230270
2019-09-30	213166
2019-12-31	194733
2020-03-31	216081
2020-06-30	192519
2020-09-30	177645
2020-12-31	196192
2021-03-31	202510
2021-06-30	190239
2021-09-30	205741
2021-12-31	211314
2022-03-31	213046
2022-06-30	191308
2022-09-30	168863
2022-12-31	172389
2023-03-31	191583
2023-06-30	184310
2023-09-30	146177