Quarter	US dollars
2004-12-31	-2
2005-03-31	-28
2005-06-30	-4
2005-09-30	-7
2005-12-31	-3
2006-03-31	-5
2006-06-30	-11
2006-09-30	-9
2006-12-31	-2
2007-03-31	0
2007-06-30	-4
2007-09-30	-6
2007-12-31	-4
2008-03-31	-14
2008-06-30	-6
2008-09-30	-11
2008-12-31	-13
2009-03-31	-19
2009-06-30	-13
2009-09-30	-18
2009-12-31	-10
2010-03-31	-6
2010-06-30	-40
2010-09-30	-54
2010-12-31	-42
2011-03-31	-66
2011-06-30	-67
2011-09-30	-47
2011-12-31	-59
2012-03-31	-30
2012-06-30	-3
2012-09-30	-21
2012-12-31	-21
2013-03-31	-88
2013-06-30	-38
2013-09-30	-31
2013-12-31	-28
2014-03-31	-85
2014-06-30	-62
2014-09-30	-42
2014-12-31	-53
2015-03-31	-40
2015-06-30	-44
2015-09-30	-38
2015-12-31	-30
2016-03-31	-16
2016-06-30	-4
2016-09-30	1
2016-12-31	-54
2017-03-31	-1
2017-06-30	-153
2017-09-30	-123
2017-12-31	-124
2018-03-31	-98
2018-06-30	-110
2018-09-30	-33
2018-12-31	-26
2019-03-31	-30
2019-06-30	-43
2019-09-30	-42
2019-12-31	-45
2020-03-31	-37
2020-06-30	-89
2020-09-30	-151
2020-12-31	-30
2021-03-31	-17
2021-06-30	-15
2021-09-30	-12
2021-12-31	-69
2022-03-31	-62
2022-06-30	-47
2022-09-30	-169
2022-12-31	-130
2023-03-31	-93
2023-06-30	1
2023-09-30	0