Quarter	US dollars
2004-12-31	6464
2005-03-31	3839
2005-06-30	3377
2005-09-30	904
2005-12-31	1135
2006-03-31	696
2006-06-30	1200
2006-09-30	-1194
2006-12-31	-2217
2007-03-31	-5947
2007-06-30	-6493
2007-09-30	-6483
2007-12-31	-3556
2008-03-31	-5511
2008-06-30	-8551
2008-09-30	-4482
2008-12-31	-5949
2009-03-31	-4540
2009-06-30	-7109
2009-09-30	-8825
2009-12-31	-9479
2010-03-31	-7596
2010-06-30	-9413
2010-09-30	-9757
2010-12-31	-8277
2011-03-31	-8594
2011-06-30	-10078
2011-09-30	-9114
2011-12-31	-6144
2012-03-31	-5654
2012-06-30	-6091
2012-09-30	-6828
2012-12-31	-6061
2013-03-31	-5573
2013-06-30	-3725
2013-09-30	-4295
2013-12-31	-2676
2014-03-31	3943
2014-06-30	2248
2014-09-30	584
2014-12-31	3090
2015-03-31	1862
2015-06-30	3229
2015-09-30	2110
2015-12-31	2258
2016-03-31	1587
2016-06-30	587
2016-09-30	908
2016-12-31	3788
2017-03-31	3812
2017-06-30	1834
2017-09-30	2384
2017-12-31	5308
2018-03-31	3952
2018-06-30	2172
2018-09-30	3211
2018-12-31	4409
2019-03-31	3519
2019-06-30	2636
2019-09-30	-1610
2019-12-31	-468
2020-03-31	-1482
2020-06-30	-1126
2020-09-30	-801
2020-12-31	1220
2021-03-31	-730
2021-06-30	345
2021-09-30	2598
2021-12-31	2088
2022-03-31	1723
2022-06-30	3126
2022-09-30	2731
2022-12-31	1664
2023-03-31	877
2023-06-30	-300
2023-09-30	455