Quarter	US dollars
2004-12-31	4458
2005-03-31	6537
2005-06-30	6380
2005-09-30	8343
2005-12-31	7599
2006-03-31	6296
2006-06-30	7414
2006-09-30	5825
2006-12-31	7519
2007-03-31	7494
2007-06-30	10614
2007-09-30	8659
2007-12-31	8682
2008-03-31	11446
2008-06-30	10002
2008-09-30	8397
2008-12-31	7473
2009-03-31	5916
2009-06-30	6665
2009-09-30	5735
2009-12-31	5787
2010-03-31	5621
2010-06-30	7596
2010-09-30	7485
2010-12-31	7702
2011-03-31	7532
2011-06-30	6191
2011-09-30	5071
2011-12-31	5858
2012-03-31	4929
2012-06-30	5112
2012-09-30	9169
2012-12-31	9510
2013-03-31	8605
2013-06-30	8281
2013-09-30	9737
2013-12-31	7119
2014-03-31	9607
2014-06-30	8884
2014-09-30	7376
2014-12-31	8182
2015-03-31	6614
2015-06-30	8472
2015-09-30	9384
2015-12-31	6989
2016-03-31	7071
2016-06-30	7350
2016-09-30	7965
2016-12-31	7360
2017-03-31	7059
2017-06-30	7916
2017-09-30	8148
2017-12-31	8371
2018-03-31	7750
2018-06-30	7684
2018-09-30	8065
2018-12-31	22005
2019-03-31	20901
2019-06-30	25774
2019-09-30	22548
2019-12-31	13217
2020-03-31	18689
2020-06-30	14186
2020-09-30	13680
2020-12-31	15230
2021-03-31	16620
2021-06-30	15276
2021-09-30	13367
2021-12-31	8000
2022-03-31	10555
2022-06-30	15611
2022-09-30	11548
2022-12-31	12280
2023-03-31	13566
2023-06-30	14078
2023-09-30	13936