Quarter	US dollars
1999-03-31	54
1999-06-30	42
1999-09-30	36
1999-12-31	37
2000-03-31	54
2000-06-30	61
2000-09-30	63
2000-12-31	42
2001-03-31	53
2001-06-30	33
2001-09-30	15
2001-12-31	8
2002-03-31	7
2002-06-30	6
2002-09-30	4
2002-12-31	1
2003-03-31	7
2003-06-30	50
2003-09-30	30
2003-12-31	35
2004-03-31	3
2004-06-30	7
2004-09-30	17
2004-12-31	7
2005-03-31	6
2005-06-30	5
2005-09-30	0
2005-12-31	11
2006-03-31	2
2006-06-30	3
2006-09-30	3
2006-12-31	100
2007-03-31	5
2007-06-30	139
2007-09-30	7
2007-12-31	74
2008-03-31	12
2008-06-30	6
2008-09-30	9
2008-12-31	23
2009-03-31	25
2009-06-30	141
2009-09-30	23
2009-12-31	28
2010-03-31	34
2010-06-30	34
2010-09-30	16
2010-12-31	827
2011-03-31	171
2011-06-30	118
2011-09-30	84
2011-12-31	99
2012-03-31	135
2012-06-30	89
2012-09-30	78
2012-12-31	76
2013-03-31	67
2013-06-30	104
2013-09-30	99
2013-12-31	110
2014-03-31	349
2014-06-30	539
2014-09-30	132
2014-12-31	259
2015-03-31	92
2015-06-30	320
2015-09-30	259
2015-12-31	301
2016-03-31	61
2016-06-30	22
2016-09-30	13
2016-12-31	31
2017-03-31	113
2017-06-30	81
2017-09-30	131
2017-12-31	247
2018-03-31	90
2018-06-30	535
2018-09-30	385
2018-12-31	74
2019-03-31	152
2019-06-30	297
2019-09-30	383
2019-12-31	287
2020-03-31	513
2020-06-30	802
2020-09-30	660
2020-12-31	1385
2021-03-31	2119
2021-06-30	3352
2021-09-30	2917
2021-12-31	2687
2022-03-31	2215
2022-06-30	2257
2022-09-30	2313
2022-12-31	3338
2023-03-31	1963
2023-06-30	2109
2023-09-30	2261