Quarter	US dollars
2004-12-31	2644
2005-03-31	1958
2005-06-30	2553
2005-09-30	2598
2005-12-31	6168
2006-03-31	5573
2006-06-30	5223
2006-09-30	7921
2006-12-31	9626
2007-03-31	9324
2007-06-30	12265
2007-09-30	13109
2007-12-31	12481
2008-03-31	12613
2008-06-30	14424
2008-09-30	11421
2008-12-31	8493
2009-03-31	8050
2009-06-30	8091
2009-09-30	3357
2009-12-31	-11972
2010-03-31	-14585
2010-06-30	-8817
2010-09-30	-8564
2010-12-31	-10121
2011-03-31	-10553
2011-06-30	-9960
2011-09-30	-8399
2011-12-31	-7090
2012-03-31	-6194
2012-06-30	-5010
2012-09-30	-5975
2012-12-31	-524
2013-03-31	357
2013-06-30	267
2013-09-30	-115
2013-12-31	1597
2014-03-31	1576
2014-06-30	118
2014-09-30	-755
2014-12-31	31
2015-03-31	-1364
2015-06-30	-352
2015-09-30	-191
2015-12-31	200
2016-03-31	-768
2016-06-30	-418
2016-09-30	-1059
2016-12-31	-1003
2017-03-31	-608
2017-06-30	-1117
2017-09-30	-802
2017-12-31	-1533
2018-03-31	-2123
2018-06-30	-1949
2018-09-30	-2257
2018-12-31	-1795
2019-03-31	-2292
2019-06-30	-3419
2019-09-30	-4351
2019-12-31	-3786
2020-03-31	-2977
2020-06-30	-2941
2020-09-30	-3431
2020-12-31	-2765
2021-03-31	-3561
2021-06-30	-3144
2021-09-30	-3139
2021-12-31	-3341
2022-03-31	-4363
2022-06-30	-3941
2022-09-30	-3985
2022-12-31	-3095
2023-03-31	-1001
2023-06-30	-480
2023-09-30	-504