Quarter	US dollars
2004-12-31	3126
2005-03-31	3395
2005-06-30	2461
2005-09-30	2904
2005-12-31	2637
2006-03-31	3459
2006-06-30	3068
2006-09-30	3060
2006-12-31	3957
2007-03-31	3311
2007-06-30	3246
2007-09-30	4788
2007-12-31	3934
2008-03-31	4778
2008-06-30	4410
2008-09-30	7403
2008-12-31	4534
2009-03-31	3740
2009-06-30	4026
2009-09-30	3107
2009-12-31	4723
2010-03-31	4424
2010-06-30	3960
2010-09-30	3988
2010-12-31	5351
2011-03-31	5545
2011-06-30	2805
2011-09-30	4445
2011-12-31	4696
2012-03-31	3447
2012-06-30	5528
2012-09-30	5525
2012-12-31	5717
2013-03-31	5494
2013-06-30	4122
2013-09-30	4638
2013-12-31	4798
2014-03-31	4707
2014-06-30	4922
2014-09-30	4505
2014-12-31	4433
2015-03-31	4390
2015-06-30	4579
2015-09-30	4861
2015-12-31	8359
2016-03-31	8536
2016-06-30	6552
2016-09-30	6333
2016-12-31	5263
2017-03-31	5741
2017-06-30	5575
2017-09-30	5641
2017-12-31	5274
2018-03-31	4711
2018-06-30	5792
2018-09-30	5721
2018-12-31	4961
2019-03-31	5995
2019-06-30	5747
2019-09-30	6474
2019-12-31	4869
2020-03-31	4764
2020-06-30	5319
2020-09-30	6603
2020-12-31	6546
2021-03-31	11029
2021-06-30	9987
2021-09-30	8073
2021-12-31	4838
2022-03-31	4238
2022-06-30	2778
2022-09-30	4111
2022-12-31	6266
2023-03-31	6605
2023-06-30	8985
2023-09-30	7992