Quarter	US dollars
2004-12-31	699
2005-03-31	658
2005-06-30	900
2005-09-30	511
2005-12-31	153
2006-03-31	-305
2006-06-30	-790
2006-09-30	-1250
2006-12-31	-106
2007-03-31	-761
2007-06-30	-512
2007-09-30	-894
2007-12-31	-137
2008-03-31	-121
2008-06-30	-492
2008-09-30	-298
2008-12-31	-690
2009-03-31	-1069
2009-06-30	-1401
2009-09-30	-2594
2009-12-31	-3620
2010-03-31	-4326
2010-06-30	-3951
2010-09-30	-3977
2010-12-31	-6584
2011-03-31	-6813
2011-06-30	-6088
2011-09-30	-4658
2011-12-31	-5367
2012-03-31	-5389
2012-06-30	-4215
2012-09-30	-2480
2012-12-31	-2493
2013-03-31	-3908
2013-06-30	-2864
2013-09-30	-2627
2013-12-31	-1613
2014-03-31	-2973
2014-06-30	-2597
2014-09-30	-3251
2014-12-31	-2799
2015-03-31	-3627
2015-06-30	142
2015-09-30	-982
2015-12-31	-408
2016-03-31	-575
2016-06-30	328
2016-09-30	980
2016-12-31	2247
2017-03-31	1351
2017-06-30	53
2017-09-30	1042
2017-12-31	1490
2018-03-31	1733
2018-06-30	1635
2018-09-30	-355
2018-12-31	-289
2019-03-31	-563
2019-06-30	-1515
2019-09-30	-1604
2019-12-31	-1798
2020-03-31	-1282
2020-06-30	-1149
2020-09-30	-1380
2020-12-31	-3388
2021-03-31	-3212
2021-06-30	-4057
2021-09-30	-4737
2021-12-31	-3373
2022-03-31	-3321
2022-06-30	-2957
2022-09-30	-3041
2022-12-31	-3126
2023-03-31	-2553
2023-06-30	-3111
2023-09-30	-2270