Quarter	US dollars
1999-09-30	2
1999-12-31	2
2000-03-31	2
2000-06-30	2
2000-09-30	1
2000-12-31	0
2001-03-31	0
2001-06-30	0
2001-09-30	0
2001-12-31	1
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	2
2004-03-31	2
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	2
2006-03-31	2
2006-06-30	2
2006-09-30	2
2006-12-31	2
2007-03-31	2
2007-06-30	2
2007-09-30	4
2007-12-31	2
2008-03-31	28
2008-06-30	20
2008-09-30	9
2008-12-31	17
2009-03-31	17
2009-06-30	10
2009-09-30	18
2009-12-31	24
2010-03-31	27
2010-06-30	33
2010-09-30	33
2010-12-31	30
2011-03-31	22
2011-06-30	27
2011-09-30	30
2011-12-31	60
2012-03-31	43
2012-06-30	55
2012-09-30	58
2012-12-31	55
2013-03-31	76
2013-06-30	27
2013-09-30	21
2013-12-31	17
2014-03-31	22
2014-06-30	27
2014-09-30	39
2014-12-31	86
2015-03-31	76
2015-06-30	39
2015-09-30	45
2015-12-31	33
2016-03-31	50
2016-06-30	58
2016-09-30	49
2016-12-31	20
2017-03-31	21
2017-06-30	30
2017-09-30	27
2017-12-31	16
2018-03-31	11
2018-06-30	4
2018-09-30	5
2018-12-31	11
2019-03-31	17
2019-06-30	23
2019-09-30	10
2019-12-31	7
2020-03-31	20
2020-06-30	20
2020-09-30	17
2020-12-31	22
2021-03-31	14
2021-06-30	17
2021-09-30	20
2021-12-31	19
2022-03-31	7
2022-06-30	13
2022-09-30	33
2022-12-31	17
2023-03-31	8
2023-06-30	9
2023-09-30	6