Quarter	US dollars
1986-09-30	721451
1986-12-31	759283
1987-03-31	798728
1987-06-30	831249
1987-09-30	854865
1987-12-31	928344
1988-03-31	921747
1988-06-30	910076
1988-09-30	930695
1988-12-31	962261
1989-03-31	974976
1989-06-30	948722
1989-09-30	999352
1989-12-31	1028490
1990-03-31	1046432
1990-06-30	1065026
1990-09-30	1152133
1990-12-31	1208014
1991-03-31	1139641
1991-06-30	1078313
1991-09-30	1118491
1991-12-31	1122633
1992-03-31	1055389
1992-06-30	1095337
1992-09-30	1159816
1992-12-31	1115268
1993-03-31	1113541
1993-06-30	1098069
1993-09-30	1111048
1993-12-31	1131616
1994-03-31	1149391
1994-06-30	1182471
1994-09-30	1236409
1994-12-31	1283922
1995-03-31	1401708
1995-06-30	1401145
1995-09-30	1399078
1995-12-31	1442760
1996-03-31	1457855
1996-06-30	1460978
1996-09-30	1496645
1996-12-31	1554885
1997-03-31	1580969
1997-06-30	1603008
1997-09-30	1637789
1997-12-31	1771756
1998-03-31	1760606
1998-06-30	1823306
1998-09-30	1980036
1998-12-31	1917100
1999-03-31	1916022
1999-06-30	1945123
1999-09-30	1963538
1999-12-31	1883729
2000-03-31	2043289
2000-06-30	2079218
2000-09-30	2062503
2000-12-31	2178999
2001-03-31	2305991
2001-06-30	2222877
2001-09-30	2311635
2001-12-31	2335122
2002-03-31	2315428
2002-06-30	2455911
2002-09-30	2538011
2002-12-31	2729666
2003-03-31	2883425
2003-06-30	3090560
2003-09-30	3112450
2003-12-31	3348544
2004-03-31	3690496
2004-06-30	3694469
2004-09-30	3850556
2004-12-31	4129398
2005-03-31	4315667
2005-06-30	4320124
2005-09-30	4407111
2005-12-31	4373623
2006-03-31	4850286
2006-06-30	5104643
2006-09-30	5236726
2006-12-31	5427127
2007-03-31	6136747
2007-06-30	6372017
2007-09-30	6936457
2007-12-31	7307361
2008-03-31	7952759
2008-06-30	7234006
2008-09-30	7014937
2008-12-31	6141324
2009-03-31	5985810
2009-06-30	6086653
2009-09-30	6064880
2009-12-31	5992192
2010-03-31	5913071
2010-06-30	5619087
2010-09-30	6013541
2010-12-31	5898819
2011-03-31	6059459
2011-06-30	6080043
2011-09-30	6226028
2011-12-31	6039152
2012-03-31	6210127
2012-06-30	5813197
2012-09-30	5880673
2012-12-31	5821187
2013-03-31	5583235
2013-06-30	5441830
2013-09-30	5366675
2013-12-31	5348776
2014-03-31	5327887
2014-06-30	5397483
2014-09-30	5213377
2014-12-31	5039493
2015-03-31	4858873
2015-06-30	4809397
2015-09-30	4735405
2015-12-31	4586278
2016-03-31	4592954
2016-06-30	4649172
2016-09-30	4595171
2016-12-31	4371031
2017-03-31	4483078
2017-06-30	4653029
2017-09-30	4834775
2017-12-31	4994375
2018-03-31	5171652
2018-06-30	4893720
2018-09-30	4805180
2018-12-31	4889039
2019-03-31	4949909
2019-06-30	4964084
2019-09-30	4990615
2019-12-31	4998330
2020-03-31	5322857
2020-06-30	5088799
2020-09-30	5278928
2020-12-31	5599393
2021-03-31	5616249
2021-06-30	5567122
2021-09-30	5511829
2021-12-31	5656352
2022-03-31	5750883
2022-06-30	5590709
2022-09-30	5363017
2022-12-31	5385061
2023-03-31	5465523
2023-06-30	5436335
2023-09-30	5394084