Quarter	US dollars
2004-12-31	4049
2005-03-31	2303
2005-06-30	1864
2005-09-30	1228
2005-12-31	3548
2006-03-31	3521
2006-06-30	3194
2006-09-30	3189
2006-12-31	3188
2007-03-31	4027
2007-06-30	4003
2007-09-30	3973
2007-12-31	4900
2008-03-31	3735
2008-06-30	3708
2008-09-30	4639
2008-12-31	5053
2009-03-31	3832
2009-06-30	3262
2009-09-30	1252
2009-12-31	-3985
2010-03-31	-3490
2010-06-30	-6122
2010-09-30	-7180
2010-12-31	-4939
2011-03-31	-6907
2011-06-30	-4854
2011-09-30	-2912
2011-12-31	-3170
2012-03-31	-2787
2012-06-30	-2083
2012-09-30	-3165
2012-12-31	-157
2013-03-31	830
2013-06-30	834
2013-09-30	714
2013-12-31	673
2014-03-31	514
2014-06-30	521
2014-09-30	412
2014-12-31	176
2015-03-31	61
2015-06-30	513
2015-09-30	329
2015-12-31	510
2016-03-31	242
2016-06-30	209
2016-09-30	277
2016-12-31	244
2017-03-31	-171
2017-06-30	-487
2017-09-30	-280
2017-12-31	-81
2018-03-31	-49
2018-06-30	-289
2018-09-30	10
2018-12-31	-309
2019-03-31	-9
2019-06-30	121
2019-09-30	205
2019-12-31	227
2020-03-31	-11
2020-06-30	-61
2020-09-30	485
2020-12-31	438
2021-03-31	428
2021-06-30	216
2021-09-30	520
2021-12-31	115
2022-03-31	287
2022-06-30	-173
2022-09-30	114
2022-12-31	333
2023-03-31	592
2023-06-30	1067
2023-09-30	1032