Quarter	US dollars
2004-12-31	-2279
2005-03-31	-3042
2005-06-30	-2205
2005-09-30	-2287
2005-12-31	-1253
2006-03-31	-9111
2006-06-30	-9951
2006-09-30	-14732
2006-12-31	-17114
2007-03-31	-7392
2007-06-30	-6435
2007-09-30	-3470
2007-12-31	-5684
2008-03-31	-10307
2008-06-30	-6991
2008-09-30	-6293
2008-12-31	-5932
2009-03-31	-6154
2009-06-30	-6411
2009-09-30	-6685
2009-12-31	-10696
2010-03-31	-7037
2010-06-30	-7764
2010-09-30	-6278
2010-12-31	-7854
2011-03-31	-11782
2011-06-30	-9165
2011-09-30	-7347
2011-12-31	-5269
2012-03-31	-4775
2012-06-30	-3496
2012-09-30	-3094
2012-12-31	-1387
2013-03-31	-2074
2013-06-30	-2545
2013-09-30	-3172
2013-12-31	-1618
2014-03-31	-330
2014-06-30	-380
2014-09-30	339
2014-12-31	-91
2015-03-31	-2003
2015-06-30	-357
2015-09-30	-56
2015-12-31	-113
2016-03-31	-1178
2016-06-30	-774
2016-09-30	-372
2016-12-31	-111
2017-03-31	-89
2017-06-30	-721
2017-09-30	181
2017-12-31	1573
2018-03-31	1663
2018-06-30	1569
2018-09-30	2556
2018-12-31	1714
2019-03-31	-64
2019-06-30	416
2019-09-30	-1818
2019-12-31	2160
2020-03-31	141
2020-06-30	-428
2020-09-30	-854
2020-12-31	314
2021-03-31	926
2021-06-30	1199
2021-09-30	1743
2021-12-31	1434
2022-03-31	1107
2022-06-30	1776
2022-09-30	2449
2022-12-31	2590
2023-03-31	1579
2023-06-30	1887
2023-09-30	1653