Quarter	US dollars
1986-09-30	694819
1986-12-31	719302
1987-03-31	753050
1987-06-30	774570
1987-09-30	804042
1987-12-31	880501
1988-03-31	864916
1988-06-30	848673
1988-09-30	867788
1988-12-31	888397
1989-03-31	887392
1989-06-30	866691
1989-09-30	898786
1989-12-31	929303
1990-03-31	941064
1990-06-30	958280
1990-09-30	1045167
1990-12-31	1076959
1991-03-31	1018553
1991-06-30	967095
1991-09-30	998312
1991-12-31	992208
1992-03-31	945060
1992-06-30	987449
1992-09-30	1070505
1992-12-31	1019456
1993-03-31	1013184
1993-06-30	1005868
1993-09-30	1022816
1993-12-31	1053634
1994-03-31	1073367
1994-06-30	1111400
1994-09-30	1162561
1994-12-31	1200670
1995-03-31	1299773
1995-06-30	1310280
1995-09-30	1314136
1995-12-31	1350859
1996-03-31	1360405
1996-06-30	1368357
1996-09-30	1414914
1996-12-31	1460350
1997-03-31	1515186
1997-06-30	1537445
1997-09-30	1539219
1997-12-31	1685142
1998-03-31	1695105
1998-06-30	1762091
1998-09-30	1914278
1998-12-31	1868888
1999-03-31	1869169
1999-06-30	1866418
1999-09-30	1877243
1999-12-31	1802434
2000-03-31	1942809
2000-06-30	1984784
2000-09-30	1971520
2000-12-31	2059961
2001-03-31	2181677
2001-06-30	2089849
2001-09-30	2184724
2001-12-31	2168523
2002-03-31	2139941
2002-06-30	2262502
2002-09-30	2332078
2002-12-31	2477293
2003-03-31	2614606
2003-06-30	2814504
2003-09-30	2827604
2003-12-31	3023604
2004-03-31	3352296
2004-06-30	3327991
2004-09-30	3422381
2004-12-31	3643328
2005-03-31	3834478
2005-06-30	3905383
2005-09-30	3949138
2005-12-31	3937727
2006-03-31	4352119
2006-06-30	4558987
2006-09-30	4735464
2006-12-31	4914159
2007-03-31	5538698
2007-06-30	5821813
2007-09-30	6258751
2007-12-31	6497189
2008-03-31	7075014
2008-06-30	6452093
2008-09-30	6200807
2008-12-31	5499382
2009-03-31	5337995
2009-06-30	5401181
2009-09-30	5371863
2009-12-31	5235919
2010-03-31	5245413
2010-06-30	5082421
2010-09-30	5510122
2010-12-31	5298937
2011-03-31	5529577
2011-06-30	5578651
2011-09-30	5817552
2011-12-31	5563792
2012-03-31	5733703
2012-06-30	5455455
2012-09-30	5433964
2012-12-31	5330033
2013-03-31	5153722
2013-06-30	5025049
2013-09-30	4886491
2013-12-31	4831375
2014-03-31	4956171
2014-06-30	4991399
2014-09-30	4847769
2014-12-31	4695321
2015-03-31	4544889
2015-06-30	4492204
2015-09-30	4461276
2015-12-31	4340280
2016-03-31	4366126
2016-06-30	4458739
2016-09-30	4438585
2016-12-31	4221105
2017-03-31	4289261
2017-06-30	4416634
2017-09-30	4620355
2017-12-31	4775650
2018-03-31	4995487
2018-06-30	4712573
2018-09-30	4626486
2018-12-31	4744885
2019-03-31	4726108
2019-06-30	4743654
2019-09-30	4689284
2019-12-31	4672219
2020-03-31	5149411
2020-06-30	4827274
2020-09-30	4941798
2020-12-31	5210865
2021-03-31	5232808
2021-06-30	5217192
2021-09-30	5182246
2021-12-31	5279038
2022-03-31	5449548
2022-06-30	5327591
2022-09-30	5218836
2022-12-31	5165742
2023-03-31	5292727
2023-06-30	5201432
2023-09-30	5184800