Quarter	US dollars
2004-12-31	3700
2005-03-31	3662
2005-06-30	3252
2005-09-30	3536
2005-12-31	1006
2006-03-31	1632
2006-06-30	1204
2006-09-30	971
2006-12-31	1503
2007-03-31	1673
2007-06-30	1547
2007-09-30	1703
2007-12-31	1856
2008-03-31	1711
2008-06-30	2400
2008-09-30	1422
2008-12-31	2467
2009-03-31	6777
2009-06-30	5848
2009-09-30	5981
2009-12-31	3125
2010-03-31	2196
2010-06-30	3657
2010-09-30	4556
2010-12-31	2558
2011-03-31	2094
2011-06-30	2420
2011-09-30	2681
2011-12-31	4133
2012-03-31	4091
2012-06-30	4795
2012-09-30	3015
2012-12-31	4509
2013-03-31	4313
2013-06-30	3993
2013-09-30	3512
2013-12-31	3863
2014-03-31	3561
2014-06-30	3611
2014-09-30	7625
2014-12-31	10214
2015-03-31	10841
2015-06-30	10133
2015-09-30	9679
2015-12-31	9985
2016-03-31	8101
2016-06-30	8654
2016-09-30	8851
2016-12-31	5940
2017-03-31	5973
2017-06-30	6595
2017-09-30	5731
2017-12-31	4870
2018-03-31	5915
2018-06-30	4919
2018-09-30	4067
2018-12-31	3239
2019-03-31	4680
2019-06-30	4070
2019-09-30	5113
2019-12-31	2881
2020-03-31	3100
2020-06-30	2611
2020-09-30	1952
2020-12-31	1897
2021-03-31	2180
2021-06-30	6978
2021-09-30	7819
2021-12-31	5883
2022-03-31	4363
2022-06-30	1668
2022-09-30	796
2022-12-31	216
2023-03-31	229
2023-06-30	195
2023-09-30	1130