Quarter	US dollars
2004-12-31	4942
2005-03-31	5155
2005-06-30	4967
2005-09-30	5269
2005-12-31	5728
2006-03-31	5948
2006-06-30	7627
2006-09-30	7660
2006-12-31	8366
2007-03-31	8977
2007-06-30	10742
2007-09-30	11061
2007-12-31	11977
2008-03-31	16413
2008-06-30	18470
2008-09-30	17035
2008-12-31	15333
2009-03-31	14970
2009-06-30	15801
2009-09-30	16070
2009-12-31	16941
2010-03-31	15801
2010-06-30	14419
2010-09-30	16467
2010-12-31	17541
2011-03-31	19444
2011-06-30	19622
2011-09-30	18441
2011-12-31	16503
2012-03-31	16246
2012-06-30	14928
2012-09-30	14229
2012-12-31	14089
2013-03-31	13016
2013-06-30	12578
2013-09-30	12772
2013-12-31	12401
2014-03-31	12153
2014-06-30	11474
2014-09-30	9833
2014-12-31	9217
2015-03-31	7755
2015-06-30	7965
2015-09-30	7654
2015-12-31	7273
2016-03-31	7382
2016-06-30	1982
2016-09-30	1936
2016-12-31	907
2017-03-31	853
2017-06-30	839
2017-09-30	592
2017-12-31	534
2018-03-31	530
2018-06-30	857
2018-09-30	831
2018-12-31	789
2019-03-31	646
2019-06-30	840
2019-09-30	533
2019-12-31	527
2020-03-31	561
2020-06-30	599
2020-09-30	446
2020-12-31	329
2021-03-31	292
2021-06-30	503
2021-09-30	511
2021-12-31	679
2022-03-31	634
2022-06-30	598
2022-09-30	602
2022-12-31	442
2023-03-31	469
2023-06-30	393
2023-09-30	525