Quarter	US dollars
2004-12-31	13
2005-03-31	2
2005-06-30	7
2005-09-30	9
2005-12-31	-7
2006-03-31	-3
2006-06-30	-11
2006-09-30	-2
2006-12-31	-12
2007-03-31	-16
2007-06-30	-22
2007-09-30	-22
2007-12-31	-18
2008-03-31	-18
2008-06-30	-20
2008-09-30	-16
2008-12-31	-23
2009-03-31	-24
2009-06-30	-16
2009-09-30	-18
2009-12-31	-36
2010-03-31	-30
2010-06-30	-18
2010-09-30	-27
2010-12-31	-28
2011-03-31	-37
2011-06-30	-34
2011-09-30	-12
2011-12-31	-20
2012-03-31	-13
2012-06-30	-16
2012-09-30	-39
2012-12-31	-31
2013-03-31	-24
2013-06-30	-14
2013-09-30	-18
2013-12-31	-28
2014-03-31	-3
2014-06-30	27
2014-09-30	-11
2014-12-31	-8
2015-03-31	-15
2015-06-30	-17
2015-09-30	-30
2015-12-31	-15
2016-03-31	-32
2016-06-30	-24
2016-09-30	-17
2016-12-31	-10
2017-03-31	-10
2017-06-30	-6
2017-09-30	-17
2017-12-31	-24
2018-03-31	7
2018-06-30	3
2018-09-30	1
2018-12-31	-10
2019-03-31	-9
2019-06-30	-46
2019-09-30	-27
2019-12-31	-30
2020-03-31	-30
2020-06-30	-20
2020-09-30	-32
2020-12-31	-25
2021-03-31	-18
2021-06-30	7
2021-09-30	4
2021-12-31	-3
2022-03-31	-8
2022-06-30	4
2022-09-30	12
2022-12-31	14
2023-03-31	-33
2023-06-30	8
2023-09-30	16