Quarter	US dollars
2004-12-31	4
2005-03-31	8
2005-06-30	22
2005-09-30	18
2005-12-31	15
2006-03-31	17
2006-06-30	6
2006-09-30	4
2006-12-31	0
2007-03-31	6
2007-06-30	-32
2007-09-30	-4
2007-12-31	12
2008-03-31	34
2008-06-30	-6
2008-09-30	0
2008-12-31	-20
2009-03-31	10
2009-06-30	38
2009-09-30	29
2009-12-31	18
2010-03-31	27
2010-06-30	-46
2010-09-30	-84
2010-12-31	-64
2011-03-31	-101
2011-06-30	-85
2011-09-30	-5
2011-12-31	-15
2012-03-31	2
2012-06-30	-28
2012-09-30	-53
2012-12-31	-123
2013-03-31	-97
2013-06-30	20
2013-09-30	31
2013-12-31	-76
2014-03-31	-145
2014-06-30	-94
2014-09-30	-125
2014-12-31	-75
2015-03-31	-80
2015-06-30	-3
2015-09-30	-114
2015-12-31	-39
2016-03-31	-22
2016-06-30	-125
2016-09-30	-70
2016-12-31	-20
2017-03-31	-69
2017-06-30	-132
2017-09-30	-122
2017-12-31	-163
2018-03-31	247
2018-06-30	234
2018-09-30	149
2018-12-31	151
2019-03-31	-26
2019-06-30	-190
2019-09-30	-346
2019-12-31	-380
2020-03-31	-841
2020-06-30	-724
2020-09-30	-759
2020-12-31	-591
2021-03-31	-328
2021-06-30	-278
2021-09-30	-670
2021-12-31	-550
2022-03-31	-107
2022-06-30	-104
2022-09-30	-79
2022-12-31	-87
2023-03-31	4
2023-06-30	-12
2023-09-30	-2