Quarter	US dollars
2004-12-31	0
2005-03-31	-2
2005-06-30	4
2005-09-30	4
2005-12-31	2
2006-03-31	3
2006-06-30	2
2006-09-30	0
2006-12-31	2
2007-03-31	2
2007-06-30	0
2007-09-30	-8
2007-12-31	-6
2008-03-31	-6
2008-06-30	-2
2008-09-30	-66
2008-12-31	-56
2009-03-31	3
2009-06-30	5
2009-09-30	0
2009-12-31	13
2010-03-31	17
2010-06-30	6
2010-09-30	9
2010-12-31	9
2011-03-31	8
2011-06-30	0
2011-09-30	2
2011-12-31	-74
2012-03-31	2
2012-06-30	-3
2012-09-30	0
2012-12-31	2
2013-03-31	-6
2013-06-30	-5
2013-09-30	-3
2013-12-31	-5
2014-03-31	-5
2014-06-30	-3
2014-09-30	-3
2014-12-31	0
2015-03-31	6
2015-06-30	11
2015-09-30	21
2015-12-31	15
2016-03-31	14
2016-06-30	13
2016-09-30	5
2016-12-31	12
2017-03-31	9
2017-06-30	3
2017-09-30	7
2017-12-31	4
2018-03-31	0
2018-06-30	1
2018-09-30	-4
2018-12-31	0
2019-03-31	0
2019-06-30	-1
2019-09-30	-4
2019-12-31	-1
2020-03-31	-1
2020-06-30	-1
2020-09-30	-1
2020-12-31	0
2021-03-31	12
2021-06-30	17
2021-09-30	22
2021-12-31	12
2022-03-31	16
2022-06-30	0
2022-09-30	0
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	0