Quarter	US dollars
1999-03-31	4
1999-06-30	2
1999-09-30	3
1999-12-31	4
2000-03-31	3
2000-06-30	2
2000-09-30	3
2000-12-31	3
2001-03-31	2
2001-06-30	3
2001-09-30	2
2001-12-31	2
2002-03-31	10
2002-06-30	7
2002-09-30	7
2002-12-31	8
2003-03-31	4
2003-06-30	3
2003-09-30	9
2003-12-31	14
2004-03-31	2
2004-06-30	2
2004-09-30	0
2004-12-31	3
2005-03-31	8
2005-06-30	2
2005-09-30	8
2005-12-31	4
2006-03-31	8
2006-06-30	6
2006-09-30	3
2006-12-31	8
2007-03-31	12
2007-06-30	20
2007-09-30	20
2007-12-31	7
2008-03-31	30
2008-06-30	10
2008-09-30	9
2008-12-31	4
2009-03-31	14
2009-06-30	15
2009-09-30	7
2009-12-31	12
2010-03-31	5
2010-06-30	10
2010-09-30	36
2010-12-31	9
2011-03-31	6
2011-06-30	37
2011-09-30	9
2011-12-31	4
2012-03-31	9
2012-06-30	29
2012-09-30	6
2012-12-31	11
2013-03-31	14
2013-06-30	27
2013-09-30	79
2013-12-31	9
2014-03-31	93
2014-06-30	15
2014-09-30	52
2014-12-31	113
2015-03-31	85
2015-06-30	113
2015-09-30	13
2015-12-31	78
2016-03-31	26
2016-06-30	11
2016-09-30	54
2016-12-31	21
2017-03-31	27
2017-06-30	30
2017-09-30	84
2017-12-31	100
2018-03-31	105
2018-06-30	65
2018-09-30	80
2018-12-31	50
2019-03-31	53
2019-06-30	78
2019-09-30	67
2019-12-31	36
2020-03-31	35
2020-06-30	19
2020-09-30	5
2020-12-31	17
2021-03-31	16
2021-06-30	24
2021-09-30	27
2021-12-31	32
2022-03-31	23
2022-06-30	39
2022-09-30	64
2022-12-31	37
2023-03-31	126
2023-06-30	46
2023-09-30	50