Quarter	US dollars
2004-12-31	5086
2005-03-31	6548
2005-06-30	6315
2005-09-30	6568
2005-12-31	3847
2006-03-31	7946
2006-06-30	7307
2006-09-30	7564
2006-12-31	8893
2007-03-31	12319
2007-06-30	8943
2007-09-30	7793
2007-12-31	10596
2008-03-31	13273
2008-06-30	8406
2008-09-30	7223
2008-12-31	3467
2009-03-31	2476
2009-06-30	2383
2009-09-30	2778
2009-12-31	2270
2010-03-31	1383
2010-06-30	386
2010-09-30	-1478
2010-12-31	-714
2011-03-31	380
2011-06-30	-72
2011-09-30	-486
2011-12-31	-1289
2012-03-31	-1660
2012-06-30	-536
2012-09-30	919
2012-12-31	285
2013-03-31	1242
2013-06-30	725
2013-09-30	1143
2013-12-31	1165
2014-03-31	995
2014-06-30	922
2014-09-30	1190
2014-12-31	-30
2015-03-31	815
2015-06-30	1335
2015-09-30	1136
2015-12-31	747
2016-03-31	916
2016-06-30	1164
2016-09-30	118
2016-12-31	727
2017-03-31	-48
2017-06-30	1711
2017-09-30	2020
2017-12-31	1354
2018-03-31	1124
2018-06-30	1716
2018-09-30	1045
2018-12-31	1145
2019-03-31	1003
2019-06-30	466
2019-09-30	-97
2019-12-31	-322
2020-03-31	-672
2020-06-30	-114
2020-09-30	54
2020-12-31	45
2021-03-31	291
2021-06-30	243
2021-09-30	243
2021-12-31	456
2022-03-31	956
2022-06-30	916
2022-09-30	859
2022-12-31	1073
2023-03-31	1128
2023-06-30	1210
2023-09-30	1460