Quarter	US dollars
2004-12-31	4316
2005-03-31	2872
2005-06-30	3341
2005-09-30	2091
2005-12-31	2295
2006-03-31	2146
2006-06-30	2480
2006-09-30	1620
2006-12-31	1305
2007-03-31	1850
2007-06-30	688
2007-09-30	1701
2007-12-31	4079
2008-03-31	9101
2008-06-30	10062
2008-09-30	11550
2008-12-31	8447
2009-03-31	13561
2009-06-30	9658
2009-09-30	8307
2009-12-31	6261
2010-03-31	5396
2010-06-30	6528
2010-09-30	6961
2010-12-31	5692
2011-03-31	7095
2011-06-30	6665
2011-09-30	6244
2011-12-31	6184
2012-03-31	5326
2012-06-30	4602
2012-09-30	2592
2012-12-31	154
2013-03-31	-120
2013-06-30	259
2013-09-30	1694
2013-12-31	580
2014-03-31	-2691
2014-06-30	-1942
2014-09-30	-2967
2014-12-31	-3741
2015-03-31	-4659
2015-06-30	-4289
2015-09-30	-3613
2015-12-31	-3915
2016-03-31	-5173
2016-06-30	-5856
2016-09-30	-5986
2016-12-31	-4929
2017-03-31	-6576
2017-06-30	-6375
2017-09-30	-6399
2017-12-31	-3603
2018-03-31	-4051
2018-06-30	-3495
2018-09-30	-1814
2018-12-31	14
2019-03-31	-3069
2019-06-30	-1377
2019-09-30	-1401
2019-12-31	-982
2020-03-31	-913
2020-06-30	997
2020-09-30	-3019
2020-12-31	-1849
2021-03-31	-884
2021-06-30	-792
2021-09-30	-1112
2021-12-31	-1574
2022-03-31	-1115
2022-06-30	-893
2022-09-30	-283
2022-12-31	-205
2023-03-31	-875
2023-06-30	-638
2023-09-30	-60