Quarter	US dollars
2004-12-31	0
2005-03-31	13
2005-06-30	-2
2005-09-30	5
2005-12-31	2
2006-03-31	3
2006-06-30	0
2006-09-30	-4
2006-12-31	4
2007-03-31	4
2007-06-30	-6
2007-09-30	2
2007-12-31	8
2008-03-31	-2
2008-06-30	4
2008-09-30	0
2008-12-31	0
2009-03-31	0
2009-06-30	-2
2009-09-30	-2
2009-12-31	-8
2010-03-31	2
2010-06-30	40
2010-09-30	74
2010-12-31	66
2011-03-31	-18
2011-06-30	-35
2011-09-30	64
2011-12-31	-2
2012-03-31	-11
2012-06-30	25
2012-09-30	37
2012-12-31	86
2013-03-31	134
2013-06-30	147
2013-09-30	121
2013-12-31	139
2014-03-31	0
2014-06-30	-3
2014-09-30	169
2014-12-31	119
2015-03-31	55
2015-06-30	50
2015-09-30	74
2015-12-31	114
2016-03-31	83
2016-06-30	142
2016-09-30	99
2016-12-31	65
2017-03-31	204
2017-06-30	96
2017-09-30	31
2017-12-31	59
2018-03-31	210
2018-06-30	271
2018-09-30	23
2018-12-31	-13
2019-03-31	159
2019-06-30	103
2019-09-30	83
2019-12-31	53
2020-03-31	30
2020-06-30	35
2020-09-30	30
2020-12-31	30
2021-03-31	7
2021-06-30	0
2021-09-30	38
2021-12-31	23
2022-03-31	-5
2022-06-30	-5
2022-09-30	-5
2022-12-31	-4
2023-03-31	8
2023-06-30	29
2023-09-30	24