Quarter	US dollars
2004-12-31	-63
2005-03-31	-55
2005-06-30	-57
2005-09-30	-55
2005-12-31	-82
2006-03-31	-47
2006-06-30	-37
2006-09-30	-32
2006-12-31	-37
2007-03-31	-2
2007-06-30	8
2007-09-30	10
2007-12-31	10
2008-03-31	2
2008-06-30	-22
2008-09-30	18
2008-12-31	16
2009-03-31	17
2009-06-30	12
2009-09-30	14
2009-12-31	18
2010-03-31	15
2010-06-30	10
2010-09-30	6
2010-12-31	8
2011-03-31	6
2011-06-30	-2
2011-09-30	0
2011-12-31	3
2012-03-31	3
2012-06-30	-3
2012-09-30	2
2012-12-31	6
2013-03-31	-87
2013-06-30	-15
2013-09-30	-31
2013-12-31	-117
2014-03-31	-103
2014-06-30	-99
2014-09-30	-105
2014-12-31	-109
2015-03-31	-122
2015-06-30	-101
2015-09-30	-150
2015-12-31	-135
2016-03-31	-224
2016-06-30	-121
2016-09-30	-121
2016-12-31	-133
2017-03-31	-125
2017-06-30	-126
2017-09-30	-113
2017-12-31	-108
2018-03-31	-44
2018-06-30	-38
2018-09-30	-48
2018-12-31	-37
2019-03-31	-30
2019-06-30	-53
2019-09-30	-74
2019-12-31	-102
2020-03-31	-96
2020-06-30	-103
2020-09-30	-97
2020-12-31	-64
2021-03-31	-59
2021-06-30	-55
2021-09-30	-65
2021-12-31	-50
2022-03-31	-49
2022-06-30	-44
2022-09-30	-37
2022-12-31	-39
2023-03-31	-40
2023-06-30	-9
2023-09-30	-17