Quarter	US dollars
2004-12-31	6
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	13
2006-09-30	13
2006-12-31	2
2007-03-31	88
2007-06-30	102
2007-09-30	53
2007-12-31	54
2008-03-31	72
2008-06-30	54
2008-09-30	45
2008-12-31	40
2009-03-31	57
2009-06-30	41
2009-09-30	194
2009-12-31	254
2010-03-31	262
2010-06-30	230
2010-09-30	60
2010-12-31	175
2011-03-31	702
2011-06-30	684
2011-09-30	656
2011-12-31	555
2012-03-31	558
2012-06-30	508
2012-09-30	484
2012-12-31	624
2013-03-31	551
2013-06-30	385
2013-09-30	377
2013-12-31	274
2014-03-31	302
2014-06-30	453
2014-09-30	295
2014-12-31	331
2015-03-31	411
2015-06-30	355
2015-09-30	345
2015-12-31	450
2016-03-31	345
2016-06-30	273
2016-09-30	248
2016-12-31	193
2017-03-31	119
2017-06-30	156
2017-09-30	131
2017-12-31	55
2018-03-31	11
2018-06-30	54
2018-09-30	90
2018-12-31	64
2019-03-31	77
2019-06-30	36
2019-09-30	23
2019-12-31	-1
2020-03-31	120
2020-06-30	91
2020-09-30	-21
2020-12-31	-26
2021-03-31	-26
2021-06-30	-36
2021-09-30	-27
2021-12-31	-46
2022-03-31	26
2022-06-30	1
2022-09-30	67
2022-12-31	54
2023-03-31	21
2023-06-30	84
2023-09-30	65