Quarter	US dollars
2004-12-31	-12
2005-03-31	-13
2005-06-30	-13
2005-09-30	-9
2005-12-31	-12
2006-03-31	-5
2006-06-30	-6
2006-09-30	-2
2006-12-31	-10
2007-03-31	-16
2007-06-30	-12
2007-09-30	-14
2007-12-31	-16
2008-03-31	-34
2008-06-30	-26
2008-09-30	-30
2008-12-31	-33
2009-03-31	14
2009-06-30	-28
2009-09-30	-26
2009-12-31	-5
2010-03-31	-23
2010-06-30	-24
2010-09-30	-20
2010-12-31	-22
2011-03-31	-13
2011-06-30	-29
2011-09-30	-37
2011-12-31	-34
2012-03-31	-27
2012-06-30	-102
2012-09-30	-84
2012-12-31	-107
2013-03-31	-82
2013-06-30	-15
2013-09-30	-52
2013-12-31	-78
2014-03-31	-63
2014-06-30	-82
2014-09-30	-89
2014-12-31	-73
2015-03-31	-62
2015-06-30	-74
2015-09-30	-55
2015-12-31	-53
2016-03-31	-43
2016-06-30	-44
2016-09-30	-25
2016-12-31	-33
2017-03-31	-33
2017-06-30	-21
2017-09-30	-16
2017-12-31	-15
2018-03-31	-8
2018-06-30	0
2018-09-30	-10
2018-12-31	-5
2019-03-31	-3
2019-06-30	-3
2019-09-30	-2
2019-12-31	-1
2020-03-31	-2
2020-06-30	-2
2020-09-30	-5
2020-12-31	-8
2021-03-31	-6
2021-06-30	-4
2021-09-30	-7
2021-12-31	-7
2022-03-31	0
2022-06-30	-6
2022-09-30	-4
2022-12-31	-10
2023-03-31	-18
2023-06-30	-9
2023-09-30	0