Quarter	US dollars
1999-09-30	0
1999-12-31	0
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	0
2001-03-31	3
2001-06-30	4
2001-09-30	3
2001-12-31	0
2002-03-31	0
2002-06-30	0
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	0
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	0
2006-12-31	2
2007-03-31	4
2007-06-30	2
2007-09-30	14
2007-12-31	10
2008-03-31	14
2008-06-30	20
2008-09-30	11
2008-12-31	22
2009-03-31	11
2009-06-30	5
2009-09-30	6
2009-12-31	5
2010-03-31	6
2010-06-30	9
2010-09-30	16
2010-12-31	13
2011-03-31	8
2011-06-30	6
2011-09-30	30
2011-12-31	17
2012-03-31	10
2012-06-30	13
2012-09-30	8
2012-12-31	5
2013-03-31	9
2013-06-30	44
2013-09-30	16
2013-12-31	18
2014-03-31	15
2014-06-30	9
2014-09-30	16
2014-12-31	41
2015-03-31	52
2015-06-30	13
2015-09-30	12
2015-12-31	7
2016-03-31	6
2016-06-30	3
2016-09-30	4
2016-12-31	4
2017-03-31	5
2017-06-30	10
2017-09-30	16
2017-12-31	20
2018-03-31	27
2018-06-30	21
2018-09-30	20
2018-12-31	17
2019-03-31	10
2019-06-30	19
2019-09-30	9
2019-12-31	11
2020-03-31	20
2020-06-30	19
2020-09-30	19
2020-12-31	22
2021-03-31	23
2021-06-30	12
2021-09-30	11
2021-12-31	11
2022-03-31	13
2022-06-30	9
2022-09-30	9
2022-12-31	6
2023-03-31	9
2023-06-30	19
2023-09-30	11