Quarter	US dollars
2004-12-31	-1951
2005-03-31	-2210
2005-06-30	-3230
2005-09-30	-3318
2005-12-31	-2833
2006-03-31	-2378
2006-06-30	-2828
2006-09-30	-2640
2006-12-31	-2802
2007-03-31	-2434
2007-06-30	-738
2007-09-30	469
2007-12-31	-1826
2008-03-31	-1876
2008-06-30	-1417
2008-09-30	-1570
2008-12-31	-2365
2009-03-31	-2228
2009-06-30	-621
2009-09-30	-54
2009-12-31	-502
2010-03-31	-232
2010-06-30	102
2010-09-30	287
2010-12-31	127
2011-03-31	87
2011-06-30	2
2011-09-30	227
2011-12-31	345
2012-03-31	-142
2012-06-30	-163
2012-09-30	-228
2012-12-31	81
2013-03-31	-100
2013-06-30	2119
2013-09-30	745
2013-12-31	509
2014-03-31	990
2014-06-30	-231
2014-09-30	154
2014-12-31	-339
2015-03-31	-83
2015-06-30	-602
2015-09-30	-451
2015-12-31	-301
2016-03-31	30
2016-06-30	299
2016-09-30	508
2016-12-31	1314
2017-03-31	605
2017-06-30	48
2017-09-30	512
2017-12-31	-55
2018-03-31	-929
2018-06-30	-933
2018-09-30	-1073
2018-12-31	467
2019-03-31	-760
2019-06-30	-1457
2019-09-30	-1743
2019-12-31	-757
2020-03-31	-1034
2020-06-30	-1330
2020-09-30	-1489
2020-12-31	-869
2021-03-31	-821
2021-06-30	-1177
2021-09-30	-1141
2021-12-31	-1245
2022-03-31	-1474
2022-06-30	-930
2022-09-30	-919
2022-12-31	-1072
2023-03-31	-1515
2023-06-30	-1033
2023-09-30	-846