Quarter	US dollars
1986-09-30	6
1986-12-31	14
1987-03-31	7
1987-06-30	9
1987-09-30	18
1987-12-31	11
1988-03-31	48
1988-06-30	9
1988-09-30	7
1988-12-31	4
1989-03-31	4
1989-06-30	17
1989-09-30	6
1989-12-31	10
1990-03-31	14
1990-06-30	8
1990-09-30	21
1990-12-31	24
1991-03-31	18
1991-06-30	84
1991-09-30	24
1991-12-31	38
1992-03-31	32
1992-06-30	32
1992-09-30	132
1992-12-31	110
1993-03-31	38
1993-06-30	34
1993-09-30	31
1993-12-31	25
1994-03-31	23
1994-06-30	140
1994-09-30	159
1994-12-31	57
1995-03-31	18
1995-06-30	241
1995-09-30	18
1995-12-31	20
1996-03-31	171
1996-06-30	136
1996-09-30	21
1996-12-31	28
1997-03-31	46
1997-06-30	19
1997-09-30	1051
1997-12-31	1053
1998-03-31	1228
1998-06-30	1186
1998-09-30	334
1998-12-31	308
1999-03-31	309
1999-06-30	364
1999-09-30	380
1999-12-31	451
2000-03-31	392
2000-06-30	352
2000-09-30	327
2000-12-31	330
2001-03-31	287
2001-06-30	287
2001-09-30	263
2001-12-31	263
2002-03-31	227
2002-06-30	304
2002-09-30	238
2002-12-31	224
2003-03-31	190
2003-06-30	198
2003-09-30	164
2003-12-31	182
2004-03-31	142
2004-06-30	142
2004-09-30	103
2004-12-31	107
2005-03-31	66
2005-06-30	63
2005-09-30	121
2005-12-31	23
2006-03-31	24
2006-06-30	18
2006-09-30	16
2006-12-31	45
2007-03-31	352
2007-06-30	191
2007-09-30	57
2007-12-31	219
2008-03-31	2265
2008-06-30	121
2008-09-30	447
2008-12-31	270
2009-03-31	82
2009-06-30	433
2009-09-30	227
2009-12-31	249
2010-03-31	278
2010-06-30	360
2010-09-30	315
2010-12-31	406
2011-03-31	517
2011-06-30	516
2011-09-30	541
2011-12-31	481
2012-03-31	410
2012-06-30	440
2012-09-30	400
2012-12-31	371
2013-03-31	383
2013-06-30	376
2013-09-30	399
2013-12-31	396
2014-03-31	403
2014-06-30	406
2014-09-30	416
2014-12-31	442
2015-03-31	403
2015-06-30	461
2015-09-30	465
2015-12-31	468
2016-03-31	446
2016-06-30	400
2016-09-30	445
2016-12-31	296
2017-03-31	262
2017-06-30	255
2017-09-30	254
2017-12-31	246
2018-03-31	241
2018-06-30	213
2018-09-30	202
2018-12-31	200
2019-03-31	194
2019-06-30	166
2019-09-30	163
2019-12-31	151
2020-03-31	224
2020-06-30	238
2020-09-30	232
2020-12-31	233
2021-03-31	134
2021-06-30	106
2021-09-30	105
2021-12-31	98
2022-03-31	112
2022-06-30	79
2022-09-30	88
2022-12-31	97
2023-03-31	69
2023-06-30	46
2023-09-30	43