Quarter	US dollars
1999-09-30	20
1999-12-31	0
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	3
2001-03-31	0
2001-06-30	0
2001-09-30	0
2001-12-31	0
2002-03-31	0
2002-06-30	2
2002-09-30	0
2002-12-31	0
2003-03-31	0
2003-06-30	0
2003-09-30	0
2003-12-31	0
2004-03-31	0
2004-06-30	0
2004-09-30	0
2004-12-31	2
2005-03-31	9
2005-06-30	7
2005-09-30	11
2005-12-31	12
2006-03-31	5
2006-06-30	7
2006-09-30	4
2006-12-31	6
2007-03-31	2
2007-06-30	2
2007-09-30	0
2007-12-31	2
2008-03-31	4
2008-06-30	2
2008-09-30	11
2008-12-31	53
2009-03-31	29
2009-06-30	10
2009-09-30	14
2009-12-31	5
2010-03-31	117
2010-06-30	15
2010-09-30	11
2010-12-31	9
2011-03-31	14
2011-06-30	31
2011-09-30	48
2011-12-31	39
2012-03-31	69
2012-06-30	53
2012-09-30	48
2012-12-31	50
2013-03-31	49
2013-06-30	36
2013-09-30	36
2013-12-31	33
2014-03-31	33
2014-06-30	36
2014-09-30	36
2014-12-31	115
2015-03-31	105
2015-06-30	85
2015-09-30	95
2015-12-31	93
2016-03-31	73
2016-06-30	78
2016-09-30	58
2016-12-31	50
2017-03-31	53
2017-06-30	9
2017-09-30	4
2017-12-31	4
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	1
2019-06-30	3
2019-09-30	11
2019-12-31	1
2020-03-31	6
2020-06-30	4
2020-09-30	4
2020-12-31	3
2021-03-31	4
2021-06-30	3
2021-09-30	3
2021-12-31	7
2022-03-31	4
2022-06-30	6
2022-09-30	10
2022-12-31	7
2023-03-31	2
2023-06-30	1
2023-09-30	1