Quarter	US dollars
1999-09-30	76
1999-12-31	35
2000-03-31	137
2000-06-30	413
2000-09-30	53
2000-12-31	139
2001-03-31	144
2001-06-30	231
2001-09-30	229
2001-12-31	301
2002-03-31	262
2002-06-30	139
2002-09-30	131
2002-12-31	146
2003-03-31	378
2003-06-30	127
2003-09-30	181
2003-12-31	84
2004-03-31	53
2004-06-30	122
2004-09-30	67
2004-12-31	154
2005-03-31	206
2005-06-30	72
2005-09-30	108
2005-12-31	56
2006-03-31	25
2006-06-30	44
2006-09-30	67
2006-12-31	63
2007-03-31	41
2007-06-30	38
2007-09-30	22
2007-12-31	0
2008-03-31	40
2008-06-30	38
2008-09-30	62
2008-12-31	158
2009-03-31	123
2009-06-30	77
2009-09-30	70
2009-12-31	119
2010-03-31	171
2010-06-30	200
2010-09-30	154
2010-12-31	507
2011-03-31	253
2011-06-30	125
2011-09-30	69
2011-12-31	83
2012-03-31	62
2012-06-30	96
2012-09-30	71
2012-12-31	112
2013-03-31	118
2013-06-30	156
2013-09-30	186
2013-12-31	203
2014-03-31	112
2014-06-30	569
2014-09-30	19
2014-12-31	101
2015-03-31	128
2015-06-30	14
2015-09-30	14
2015-12-31	12
2016-03-31	3
2016-06-30	11
2016-09-30	14
2016-12-31	37
2017-03-31	35
2017-06-30	35
2017-09-30	38
2017-12-31	39
2018-03-31	65
2018-06-30	81
2018-09-30	83
2018-12-31	38
2019-03-31	35
2019-06-30	70
2019-09-30	74
2019-12-31	104
2020-03-31	96
2020-06-30	79
2020-09-30	68
2020-12-31	15
2021-03-31	17
2021-06-30	14
2021-09-30	16
2021-12-31	13
2022-03-31	11
2022-06-30	17
2022-09-30	30
2022-12-31	26
2023-03-31	23
2023-06-30	21
2023-09-30	21