Quarter	US dollars
1986-09-30	93
1986-12-31	90
1987-03-31	74
1987-06-30	127
1987-09-30	112
1987-12-31	154
1988-03-31	217
1988-06-30	364
1988-09-30	394
1988-12-31	286
1989-03-31	351
1989-06-30	226
1989-09-30	310
1989-12-31	330
1990-03-31	319
1990-06-30	302
1990-09-30	298
1990-12-31	293
1991-03-31	298
1991-06-30	304
1991-09-30	313
1991-12-31	262
1992-03-31	314
1992-06-30	364
1992-09-30	317
1992-12-31	266
1993-03-31	276
1993-06-30	280
1993-09-30	150
1993-12-31	326
1994-03-31	245
1994-06-30	440
1994-09-30	411
1994-12-31	446
1995-03-31	617
1995-06-30	229
1995-09-30	542
1995-12-31	1016
1996-03-31	1033
1996-06-30	1353
1996-09-30	1430
1996-12-31	1325
1997-03-31	1366
1997-06-30	1626
1997-09-30	2288
1997-12-31	3081
1998-03-31	2569
1998-06-30	2910
1998-09-30	2654
1998-12-31	4795
1999-03-31	4880
1999-06-30	5049
1999-09-30	5437
1999-12-31	4881
2000-03-31	5070
2000-06-30	5087
2000-09-30	5087
2000-12-31	5299
2001-03-31	5478
2001-06-30	5769
2001-09-30	6142
2001-12-31	5741
2002-03-31	5251
2002-06-30	5426
2002-09-30	4243
2002-12-31	4110
2003-03-31	4159
2003-06-30	4162
2003-09-30	3932
2003-12-31	4044
2004-03-31	4441
2004-06-30	4246
2004-09-30	4587
2004-12-31	4480
2005-03-31	4615
2005-06-30	5203
2005-09-30	9943
2005-12-31	9707
2006-03-31	10171
2006-06-30	10151
2006-09-30	10342
2006-12-31	10660
2007-03-31	10343
2007-06-30	10209
2007-09-30	10297
2007-12-31	10561
2008-03-31	10574
2008-06-30	10413
2008-09-30	8133
2008-12-31	5663
2009-03-31	6227
2009-06-30	6313
2009-09-30	8071
2009-12-31	7848
2010-03-31	8619
2010-06-30	8614
2010-09-30	8578
2010-12-31	9151
2011-03-31	9500
2011-06-30	8319
2011-09-30	8631
2011-12-31	8238
2012-03-31	6157
2012-06-30	5155
2012-09-30	5324
2012-12-31	5807
2013-03-31	5478
2013-06-30	5929
2013-09-30	5702
2013-12-31	5370
2014-03-31	6426
2014-06-30	6708
2014-09-30	7320
2014-12-31	6715
2015-03-31	7654
2015-06-30	9170
2015-09-30	8841
2015-12-31	6041
2016-03-31	5083
2016-06-30	3574
2016-09-30	4167
2016-12-31	5213
2017-03-31	5967
2017-06-30	4931
2017-09-30	5245
2017-12-31	5210
2018-03-31	7185
2018-06-30	6758
2018-09-30	6308
2018-12-31	4480
2019-03-31	3804
2019-06-30	4986
2019-09-30	5016
2019-12-31	5484
2020-03-31	5542
2020-06-30	5372
2020-09-30	5650
2020-12-31	5519
2021-03-31	5698
2021-06-30	7293
2021-09-30	8125
2021-12-31	9908
2022-03-31	11063
2022-06-30	13885
2022-09-30	13846
2022-12-31	13426
2023-03-31	13606
2023-06-30	14340
2023-09-30	13226