Quarter	US dollars
2004-12-31	-467
2005-03-31	-348
2005-06-30	-414
2005-09-30	-433
2005-12-31	-601
2006-03-31	892
2006-06-30	1137
2006-09-30	1416
2006-12-31	1417
2007-03-31	785
2007-06-30	1469
2007-09-30	1984
2007-12-31	1927
2008-03-31	1739
2008-06-30	1389
2008-09-30	2794
2008-12-31	1599
2009-03-31	986
2009-06-30	698
2009-09-30	705
2009-12-31	-368
2010-03-31	-108
2010-06-30	-2692
2010-09-30	-2641
2010-12-31	-2212
2011-03-31	-1417
2011-06-30	-1604
2011-09-30	-1429
2011-12-31	-490
2012-03-31	-703
2012-06-30	-640
2012-09-30	-602
2012-12-31	52
2013-03-31	200
2013-06-30	65
2013-09-30	79
2013-12-31	89
2014-03-31	95
2014-06-30	156
2014-09-30	185
2014-12-31	148
2015-03-31	134
2015-06-30	154
2015-09-30	95
2015-12-31	157
2016-03-31	315
2016-06-30	313
2016-09-30	277
2016-12-31	253
2017-03-31	443
2017-06-30	388
2017-09-30	449
2017-12-31	836
2018-03-31	58
2018-06-30	176
2018-09-30	391
2018-12-31	366
2019-03-31	1038
2019-06-30	2767
2019-09-30	2912
2019-12-31	861
2020-03-31	494
2020-06-30	424
2020-09-30	-28
2020-12-31	-176
2021-03-31	-266
2021-06-30	-254
2021-09-30	129
2021-12-31	89
2022-03-31	111
2022-06-30	351
2022-09-30	13
2022-12-31	12
2023-03-31	17
2023-06-30	18
2023-09-30	-35