Quarter	US dollars
2004-12-31	6136
2005-03-31	5520
2005-06-30	6159
2005-09-30	7654
2005-12-31	5545
2006-03-31	4104
2006-06-30	4035
2006-09-30	2672
2006-12-31	3110
2007-03-31	3483
2007-06-30	991
2007-09-30	1903
2007-12-31	1766
2008-03-31	3844
2008-06-30	4056
2008-09-30	2999
2008-12-31	1265
2009-03-31	3680
2009-06-30	4318
2009-09-30	4451
2009-12-31	3304
2010-03-31	2586
2010-06-30	2265
2010-09-30	2625
2010-12-31	2146
2011-03-31	1805
2011-06-30	1859
2011-09-30	1759
2011-12-31	1976
2012-03-31	1632
2012-06-30	1798
2012-09-30	2261
2012-12-31	2005
2013-03-31	1635
2013-06-30	866
2013-09-30	1213
2013-12-31	1124
2014-03-31	1094
2014-06-30	638
2014-09-30	684
2014-12-31	1047
2015-03-31	863
2015-06-30	517
2015-09-30	853
2015-12-31	925
2016-03-31	377
2016-06-30	619
2016-09-30	527
2016-12-31	415
2017-03-31	459
2017-06-30	429
2017-09-30	553
2017-12-31	307
2018-03-31	790
2018-06-30	952
2018-09-30	451
2018-12-31	-185
2019-03-31	491
2019-06-30	815
2019-09-30	524
2019-12-31	1118
2020-03-31	1178
2020-06-30	1102
2020-09-30	849
2020-12-31	459
2021-03-31	436
2021-06-30	-348
2021-09-30	-69
2021-12-31	47
2022-03-31	180
2022-06-30	319
2022-09-30	417
2022-12-31	374
2023-03-31	-170
2023-06-30	75
2023-09-30	253