Quarter	US dollars
2004-12-31	7011
2005-03-31	5484
2005-06-30	8090
2005-09-30	7570
2005-12-31	6880
2006-03-31	6735
2006-06-30	8297
2006-09-30	6768
2006-12-31	8200
2007-03-31	8357
2007-06-30	11800
2007-09-30	18290
2007-12-31	26266
2008-03-31	44876
2008-06-30	48648
2008-09-30	48919
2008-12-31	76825
2009-03-31	59498
2009-06-30	28623
2009-09-30	27001
2009-12-31	23321
2010-03-31	21064
2010-06-30	23243
2010-09-30	27541
2010-12-31	23193
2011-03-31	21628
2011-06-30	22366
2011-09-30	36944
2011-12-31	31078
2012-03-31	26690
2012-06-30	28004
2012-09-30	22643
2012-12-31	19688
2013-03-31	15993
2013-06-30	11970
2013-09-30	11851
2013-12-31	11064
2014-03-31	22123
2014-06-30	24750
2014-09-30	26528
2014-12-31	22101
2015-03-31	23288
2015-06-30	19949
2015-09-30	19069
2015-12-31	16353
2016-03-31	19731
2016-06-30	16982
2016-09-30	13838
2016-12-31	10747
2017-03-31	9229
2017-06-30	8868
2017-09-30	8086
2017-12-31	1529
2018-03-31	1499
2018-06-30	1518
2018-09-30	3466
2018-12-31	3772
2019-03-31	6196
2019-06-30	3859
2019-09-30	4188
2019-12-31	5778
2020-03-31	9351
2020-06-30	8822
2020-09-30	8495
2020-12-31	7050
2021-03-31	5552
2021-06-30	5143
2021-09-30	2116
2021-12-31	2429
2022-03-31	2272
2022-06-30	2456
2022-09-30	3018
2022-12-31	3086
2023-03-31	2801
2023-06-30	2998
2023-09-30	3318