Quarter	US dollars
2004-12-31	7227
2005-03-31	6930
2005-06-30	6550
2005-09-30	6518
2005-12-31	2666
2006-03-31	10750
2006-06-30	11847
2006-09-30	14725
2006-12-31	12417
2007-03-31	5084
2007-06-30	5279
2007-09-30	2977
2007-12-31	3641
2008-03-31	11561
2008-06-30	4446
2008-09-30	3880
2008-12-31	2757
2009-03-31	6370
2009-06-30	8221
2009-09-30	7665
2009-12-31	4021
2010-03-31	3405
2010-06-30	2452
2010-09-30	2801
2010-12-31	3151
2011-03-31	3062
2011-06-30	3799
2011-09-30	2536
2011-12-31	3912
2012-03-31	5189
2012-06-30	6183
2012-09-30	8008
2012-12-31	7937
2013-03-31	7844
2013-06-30	7075
2013-09-30	7062
2013-12-31	7725
2014-03-31	7986
2014-06-30	8938
2014-09-30	12170
2014-12-31	12602
2015-03-31	12418
2015-06-30	13922
2015-09-30	12914
2015-12-31	13333
2016-03-31	10756
2016-06-30	11597
2016-09-30	11089
2016-12-31	9227
2017-03-31	9283
2017-06-30	9649
2017-09-30	9531
2017-12-31	8904
2018-03-31	9331
2018-06-30	10026
2018-09-30	9255
2018-12-31	7379
2019-03-31	8092
2019-06-30	8250
2019-09-30	9178
2019-12-31	7567
2020-03-31	7207
2020-06-30	6453
2020-09-30	6857
2020-12-31	6996
2021-03-31	6724
2021-06-30	6802
2021-09-30	5992
2021-12-31	5179
2022-03-31	4769
2022-06-30	4959
2022-09-30	4417
2022-12-31	4313
2023-03-31	4282
2023-06-30	3832
2023-09-30	4913