Quarter	US dollars
2004-12-31	-2482
2005-03-31	-2295
2005-06-30	-2656
2005-09-30	-2682
2005-12-31	-3200
2006-03-31	-2886
2006-06-30	-1970
2006-09-30	-1788
2006-12-31	-1806
2007-03-31	-1175
2007-06-30	-1742
2007-09-30	-1235
2007-12-31	-1248
2008-03-31	-1244
2008-06-30	-1214
2008-09-30	-800
2008-12-31	-676
2009-03-31	-2081
2009-06-30	-1028
2009-09-30	-1012
2009-12-31	-1881
2010-03-31	-990
2010-06-30	-1059
2010-09-30	-52
2010-12-31	1479
2011-03-31	1864
2011-06-30	2166
2011-09-30	882
2011-12-31	685
2012-03-31	-821
2012-06-30	-19
2012-09-30	1649
2012-12-31	3386
2013-03-31	4163
2013-06-30	5055
2013-09-30	2045
2013-12-31	3687
2014-03-31	3818
2014-06-30	3177
2014-09-30	2837
2014-12-31	1860
2015-03-31	1730
2015-06-30	2561
2015-09-30	2519
2015-12-31	3152
2016-03-31	3398
2016-06-30	3513
2016-09-30	2483
2016-12-31	1751
2017-03-31	2877
2017-06-30	1730
2017-09-30	1704
2017-12-31	563
2018-03-31	1622
2018-06-30	2197
2018-09-30	2004
2018-12-31	1910
2019-03-31	2003
2019-06-30	-109
2019-09-30	414
2019-12-31	-343
2020-03-31	437
2020-06-30	2017
2020-09-30	664
2020-12-31	292
2021-03-31	283
2021-06-30	-692
2021-09-30	-483
2021-12-31	-1080
2022-03-31	-858
2022-06-30	-1517
2022-09-30	-1799
2022-12-31	-451
2023-03-31	-696
2023-06-30	-1432
2023-09-30	-734