Quarter	US dollars
2004-12-31	0
2005-03-31	-2
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	0
2006-12-31	0
2007-03-31	0
2007-06-30	0
2007-09-30	0
2007-12-31	2
2008-03-31	2
2008-06-30	2
2008-09-30	2
2008-12-31	0
2009-03-31	0
2009-06-30	-2
2009-09-30	-3
2009-12-31	-6
2010-03-31	-2
2010-06-30	-9
2010-09-30	-2
2010-12-31	-2
2011-03-31	-2
2011-06-30	0
2011-09-30	0
2011-12-31	0
2012-03-31	2
2012-06-30	0
2012-09-30	0
2012-12-31	0
2013-03-31	-2
2013-06-30	6
2013-09-30	0
2013-12-31	0
2014-03-31	10
2014-06-30	19
2014-09-30	5
2014-12-31	5
2015-03-31	15
2015-06-30	9
2015-09-30	-5
2015-12-31	-4
2016-03-31	0
2016-06-30	-11
2016-09-30	-12
2016-12-31	-11
2017-03-31	0
2017-06-30	-14
2017-09-30	-12
2017-12-31	-12
2018-03-31	-10
2018-06-30	-41
2018-09-30	-17
2018-12-31	-13
2019-03-31	-9
2019-06-30	-11
2019-09-30	-10
2019-12-31	-13
2020-03-31	-11
2020-06-30	-47
2020-09-30	-16
2020-12-31	169
2021-03-31	199
2021-06-30	221
2021-09-30	228
2021-12-31	236
2022-03-31	224
2022-06-30	208
2022-09-30	53
2022-12-31	-1
2023-03-31	-1
2023-06-30	-1
2023-09-30	-1