Quarter	US dollars
1999-09-30	0
1999-12-31	0
2000-03-31	2
2000-06-30	2
2000-09-30	0
2000-12-31	1
2001-03-31	1
2001-06-30	1
2001-09-30	6
2001-12-31	82
2002-03-31	0
2002-06-30	218
2002-09-30	2
2002-12-31	2
2003-03-31	3
2003-06-30	2
2003-09-30	13
2003-12-31	2
2004-03-31	0
2004-06-30	0
2004-09-30	0
2004-12-31	0
2005-03-31	17
2005-06-30	23
2005-09-30	14
2005-12-31	14
2006-03-31	9
2006-06-30	6
2006-09-30	9
2006-12-31	0
2007-03-31	14
2007-06-30	6
2007-09-30	-18
2007-12-31	8
2008-03-31	18
2008-06-30	18
2008-09-30	18
2008-12-31	27
2009-03-31	24
2009-06-30	23
2009-09-30	22
2009-12-31	23
2010-03-31	20
2010-06-30	22
2010-09-30	22
2010-12-31	20
2011-03-31	19
2011-06-30	21
2011-09-30	19
2011-12-31	20
2012-03-31	16
2012-06-30	16
2012-09-30	15
2012-12-31	10
2013-03-31	15
2013-06-30	14
2013-09-30	11
2013-12-31	10
2014-03-31	17
2014-06-30	29
2014-09-30	32
2014-12-31	44
2015-03-31	48
2015-06-30	35
2015-09-30	50
2015-12-31	41
2016-03-31	55
2016-06-30	60
2016-09-30	53
2016-12-31	28
2017-03-31	29
2017-06-30	27
2017-09-30	27
2017-12-31	19
2018-03-31	11
2018-06-30	7
2018-09-30	3
2018-12-31	8
2019-03-31	12
2019-06-30	18
2019-09-30	18
2019-12-31	16
2020-03-31	27
2020-06-30	27
2020-09-30	25
2020-12-31	22
2021-03-31	18
2021-06-30	17
2021-09-30	16
2021-12-31	11
2022-03-31	5
2022-06-30	11
2022-09-30	11
2022-12-31	4
2023-03-31	3
2023-06-30	2
2023-09-30	1