Quarter	US dollars
1999-03-31	5
1999-06-30	5
1999-09-30	7
1999-12-31	2
2000-03-31	17
2000-06-30	2
2000-09-30	2
2000-12-31	1
2001-03-31	1
2001-06-30	1
2001-09-30	2
2001-12-31	2
2002-03-31	7
2002-06-30	2
2002-09-30	2
2002-12-31	2
2003-03-31	2
2003-06-30	2
2003-09-30	2
2003-12-31	2
2004-03-31	1
2004-06-30	2
2004-09-30	4
2004-12-31	2
2005-03-31	3
2005-06-30	3
2005-09-30	4
2005-12-31	7
2006-03-31	3
2006-06-30	3
2006-09-30	4
2006-12-31	4
2007-03-31	4
2007-06-30	4
2007-09-30	4
2007-12-31	4
2008-03-31	7
2008-06-30	7
2008-09-30	5
2008-12-31	5
2009-03-31	4
2009-06-30	6
2009-09-30	10
2009-12-31	14
2010-03-31	11
2010-06-30	10
2010-09-30	11
2010-12-31	16
2011-03-31	13
2011-06-30	9
2011-09-30	13
2011-12-31	12
2012-03-31	13
2012-06-30	12
2012-09-30	10
2012-12-31	5
2013-03-31	9
2013-06-30	7
2013-09-30	5
2013-12-31	5
2014-03-31	5
2014-06-30	23
2014-09-30	3
2014-12-31	3
2015-03-31	3
2015-06-30	3
2015-09-30	26
2015-12-31	26
2016-03-31	24
2016-06-30	23
2016-09-30	23
2016-12-31	23
2017-03-31	24
2017-06-30	25
2017-09-30	28
2017-12-31	38
2018-03-31	31
2018-06-30	30
2018-09-30	18
2018-12-31	14
2019-03-31	21
2019-06-30	22
2019-09-30	20
2019-12-31	14
2020-03-31	20
2020-06-30	15
2020-09-30	10
2020-12-31	7
2021-03-31	22
2021-06-30	27
2021-09-30	37
2021-12-31	46
2022-03-31	59
2022-06-30	77
2022-09-30	105
2022-12-31	95
2023-03-31	87
2023-06-30	99
2023-09-30	104