Quarter	US dollars
2004-12-31	0
2005-03-31	13
2005-06-30	-2
2005-09-30	5
2005-12-31	2
2006-03-31	3
2006-06-30	0
2006-09-30	-4
2006-12-31	4
2007-03-31	4
2007-06-30	-6
2007-09-30	2
2007-12-31	8
2008-03-31	-2
2008-06-30	4
2008-09-30	0
2008-12-31	0
2009-03-31	0
2009-06-30	-2
2009-09-30	-2
2009-12-31	-8
2010-03-31	2
2010-06-30	42
2010-09-30	74
2010-12-31	66
2011-03-31	-18
2011-06-30	-35
2011-09-30	65
2011-12-31	0
2012-03-31	-10
2012-06-30	27
2012-09-30	39
2012-12-31	87
2013-03-31	135
2013-06-30	149
2013-09-30	121
2013-12-31	139
2014-03-31	2
2014-06-30	-2
2014-09-30	170
2014-12-31	120
2015-03-31	56
2015-06-30	42
2015-09-30	45
2015-12-31	40
2016-03-31	30
2016-06-30	60
2016-09-30	42
2016-12-31	47
2017-03-31	39
2017-06-30	45
2017-09-30	-23
2017-12-31	59
2018-03-31	-18
2018-06-30	9
2018-09-30	3
2018-12-31	-18
2019-03-31	9
2019-06-30	25
2019-09-30	42
2019-12-31	34
2020-03-31	2
2020-06-30	5
2020-09-30	-6
2020-12-31	11
2021-03-31	1
2021-06-30	-10
2021-09-30	24
2021-12-31	3
2022-03-31	-9
2022-06-30	-11
2022-09-30	-5
2022-12-31	7
2023-03-31	0
2023-06-30	30
2023-09-30	24