Quarter	US dollars
2004-12-31	-21
2005-03-31	-23
2005-06-30	-25
2005-09-30	-25
2005-12-31	-33
2006-03-31	-33
2006-06-30	0
2006-09-30	0
2006-12-31	-33
2007-03-31	-8
2007-06-30	-6
2007-09-30	-8
2007-12-31	-10
2008-03-31	-20
2008-06-30	-10
2008-09-30	-9
2008-12-31	-10
2009-03-31	-9
2009-06-30	-8
2009-09-30	-10
2009-12-31	-6
2010-03-31	-6
2010-06-30	-1
2010-09-30	-68
2010-12-31	-77
2011-03-31	-42
2011-06-30	-42
2011-09-30	-42
2011-12-31	-2
2012-03-31	-2
2012-06-30	-2
2012-09-30	-2
2012-12-31	-2
2013-03-31	-3
2013-06-30	-5
2013-09-30	-3
2013-12-31	-3
2014-03-31	-23
2014-06-30	-22
2014-09-30	-21
2014-12-31	-22
2015-03-31	-21
2015-06-30	-22
2015-09-30	-15
2015-12-31	-175
2016-03-31	-109
2016-06-30	-160
2016-09-30	-129
2016-12-31	-118
2017-03-31	-110
2017-06-30	-97
2017-09-30	-89
2017-12-31	-80
2018-03-31	-74
2018-06-30	-79
2018-09-30	-60
2018-12-31	-50
2019-03-31	-48
2019-06-30	-39
2019-09-30	-32
2019-12-31	-22
2020-03-31	-32
2020-06-30	-30
2020-09-30	-18
2020-12-31	-11
2021-03-31	-15
2021-06-30	-10
2021-09-30	-16
2021-12-31	-19
2022-03-31	-1
2022-06-30	-12
2022-09-30	-2
2022-12-31	-1
2023-03-31	-1
2023-06-30	-1
2023-09-30	-18