Quarter	US dollars
2004-12-31	-12666
2005-03-31	-14773
2005-06-30	-13607
2005-09-30	-14440
2005-12-31	-17817
2006-03-31	-17871
2006-06-30	-16891
2006-09-30	-17098
2006-12-31	-16552
2007-03-31	-17059
2007-06-30	-16254
2007-09-30	-12970
2007-12-31	-13751
2008-03-31	-15536
2008-06-30	-13113
2008-09-30	-8663
2008-12-31	-10909
2009-03-31	-9655
2009-06-30	-10576
2009-09-30	-10021
2009-12-31	-16179
2010-03-31	-13212
2010-06-30	-9752
2010-09-30	-13556
2010-12-31	-11112
2011-03-31	-10165
2011-06-30	-16970
2011-09-30	-12890
2011-12-31	-6967
2012-03-31	-5366
2012-06-30	-6207
2012-09-30	-6300
2012-12-31	-4920
2013-03-31	-4981
2013-06-30	-4740
2013-09-30	-1410
2013-12-31	-1081
2014-03-31	-884
2014-06-30	-545
2014-09-30	2599
2014-12-31	8068
2015-03-31	6779
2015-06-30	5161
2015-09-30	4143
2015-12-31	4875
2016-03-31	7883
2016-06-30	12422
2016-09-30	8074
2016-12-31	10763
2017-03-31	11015
2017-06-30	12318
2017-09-30	12235
2017-12-31	10297
2018-03-31	884
2018-06-30	3257
2018-09-30	1648
2018-12-31	2690
2019-03-31	1846
2019-06-30	4134
2019-09-30	5497
2019-12-31	6135
2020-03-31	4393
2020-06-30	1909
2020-09-30	2741
2020-12-31	1914
2021-03-31	459
2021-06-30	401
2021-09-30	806
2021-12-31	-515
2022-03-31	-511
2022-06-30	-947
2022-09-30	-1564
2022-12-31	-2141
2023-03-31	-1061
2023-06-30	-1986
2023-09-30	-3162