Quarter	US dollars
2004-12-31	-6
2005-03-31	-13
2005-06-30	-7
2005-09-30	-14
2005-12-31	-12
2006-03-31	-24
2006-06-30	-17
2006-09-30	-15
2006-12-31	-4
2007-03-31	-25
2007-06-30	-26
2007-09-30	-31
2007-12-31	-76
2008-03-31	-56
2008-06-30	-66
2008-09-30	-62
2008-12-31	-46
2009-03-31	-6
2009-06-30	-2
2009-09-30	2
2009-12-31	-2
2010-03-31	-5
2010-06-30	-9
2010-09-30	-17
2010-12-31	-41
2011-03-31	-34
2011-06-30	-22
2011-09-30	-34
2011-12-31	-22
2012-03-31	-13
2012-06-30	-14
2012-09-30	-18
2012-12-31	-15
2013-03-31	-17
2013-06-30	-29
2013-09-30	-19
2013-12-31	-10
2014-03-31	-10
2014-06-30	-12
2014-09-30	-16
2014-12-31	-11
2015-03-31	-1
2015-06-30	-8
2015-09-30	-3
2015-12-31	-9
2016-03-31	-14
2016-06-30	-24
2016-09-30	-23
2016-12-31	-2
2017-03-31	-20
2017-06-30	-25
2017-09-30	-16
2017-12-31	-16
2018-03-31	-15
2018-06-30	-16
2018-09-30	-17
2018-12-31	-14
2019-03-31	-26
2019-06-30	-33
2019-09-30	-33
2019-12-31	-25
2020-03-31	-58
2020-06-30	-21
2020-09-30	-18
2020-12-31	-18
2021-03-31	-25
2021-06-30	-12
2021-09-30	-32
2021-12-31	-19
2022-03-31	-42
2022-06-30	-87
2022-09-30	-101
2022-12-31	-16
2023-03-31	-1
2023-06-30	-21
2023-09-30	-26