Quarter	US dollars
2004-12-31	-113
2005-03-31	55
2005-06-30	-339
2005-09-30	-317
2005-12-31	-235
2006-03-31	-114
2006-06-30	673
2006-09-30	930
2006-12-31	1186
2007-03-31	1830
2007-06-30	1346
2007-09-30	1936
2007-12-31	1252
2008-03-31	1330
2008-06-30	1642
2008-09-30	1634
2008-12-31	1438
2009-03-31	1529
2009-06-30	2269
2009-09-30	2161
2009-12-31	1925
2010-03-31	2754
2010-06-30	2822
2010-09-30	3298
2010-12-31	6290
2011-03-31	5106
2011-06-30	5441
2011-09-30	3775
2011-12-31	3794
2012-03-31	2754
2012-06-30	3351
2012-09-30	5282
2012-12-31	6634
2013-03-31	7358
2013-06-30	7568
2013-09-30	5226
2013-12-31	5139
2014-03-31	4608
2014-06-30	4002
2014-09-30	3811
2014-12-31	3123
2015-03-31	2900
2015-06-30	4006
2015-09-30	4131
2015-12-31	4634
2016-03-31	4738
2016-06-30	4703
2016-09-30	3658
2016-12-31	3116
2017-03-31	3937
2017-06-30	2979
2017-09-30	3227
2017-12-31	2086
2018-03-31	3167
2018-06-30	3554
2018-09-30	3584
2018-12-31	3054
2019-03-31	3269
2019-06-30	868
2019-09-30	1382
2019-12-31	882
2020-03-31	1705
2020-06-30	2820
2020-09-30	1320
2020-12-31	828
2021-03-31	819
2021-06-30	-117
2021-09-30	212
2021-12-31	-644
2022-03-31	-473
2022-06-30	-1112
2022-09-30	-374
2022-12-31	621
2023-03-31	41
2023-06-30	-852
2023-09-30	-206