Quarter	US dollars
1986-09-30	1
1986-12-31	3
1987-03-31	2
1987-06-30	2
1987-09-30	2
1987-12-31	1
1988-03-31	1
1988-06-30	1
1988-09-30	1
1988-12-31	2
1989-03-31	11
1989-06-30	69
1989-09-30	82
1989-12-31	59
1990-03-31	80
1990-06-30	38
1990-09-30	134
1990-12-31	158
1991-03-31	1
1991-06-30	2
1991-09-30	4
1991-12-31	4
1992-03-31	4
1992-06-30	5
1992-09-30	7
1992-12-31	6
1993-03-31	8
1993-06-30	29
1993-09-30	30
1993-12-31	39
1994-03-31	41
1994-06-30	40
1994-09-30	42
1994-12-31	40
1995-03-31	46
1995-06-30	71
1995-09-30	59
1995-12-31	59
1996-03-31	52
1996-06-30	47
1996-09-30	64
1996-12-31	69
1997-03-31	49
1997-06-30	40
1997-09-30	44
1997-12-31	59
1998-03-31	61
1998-06-30	48
1998-09-30	52
1998-12-31	56
1999-03-31	79
1999-06-30	50
1999-09-30	69
1999-12-31	68
2000-03-31	59
2000-06-30	72
2000-09-30	63
2000-12-31	87
2001-03-31	111
2001-06-30	72
2001-09-30	100
2001-12-31	98
2002-03-31	78
2002-06-30	64
2002-09-30	80
2002-12-31	73
2003-03-31	62
2003-06-30	68
2003-09-30	73
2003-12-31	72
2004-03-31	91
2004-06-30	80
2004-09-30	140
2004-12-31	125
2005-03-31	116
2005-06-30	96
2005-09-30	111
2005-12-31	65
2006-03-31	100
2006-06-30	296
2006-09-30	223
2006-12-31	255
2007-03-31	198
2007-06-30	208
2007-09-30	226
2007-12-31	263
2008-03-31	331
2008-06-30	354
2008-09-30	216
2008-12-31	87
2009-03-31	99
2009-06-30	122
2009-09-30	114
2009-12-31	106
2010-03-31	98
2010-06-30	101
2010-09-30	72
2010-12-31	74
2011-03-31	59
2011-06-30	58
2011-09-30	56
2011-12-31	90
2012-03-31	65
2012-06-30	79
2012-09-30	82
2012-12-31	108
2013-03-31	135
2013-06-30	133
2013-09-30	79
2013-12-31	115
2014-03-31	97
2014-06-30	101
2014-09-30	76
2014-12-31	101
2015-03-31	146
2015-06-30	164
2015-09-30	84
2015-12-31	88
2016-03-31	279
2016-06-30	125
2016-09-30	129
2016-12-31	315
2017-03-31	281
2017-06-30	476
2017-09-30	534
2017-12-31	479
2018-03-31	260
2018-06-30	125
2018-09-30	283
2018-12-31	215
2019-03-31	156
2019-06-30	131
2019-09-30	214
2019-12-31	262
2020-03-31	181
2020-06-30	258
2020-09-30	131
2020-12-31	194
2021-03-31	193
2021-06-30	157
2021-09-30	173
2021-12-31	202
2022-03-31	141
2022-06-30	178
2022-09-30	164
2022-12-31	218
2023-03-31	222
2023-06-30	462
2023-09-30	478