Quarter	US dollars
2004-12-31	6958
2005-03-31	11577
2005-06-30	7876
2005-09-30	11561
2005-12-31	11374
2006-03-31	11612
2006-06-30	11660
2006-09-30	12466
2006-12-31	12949
2007-03-31	15696
2007-06-30	14887
2007-09-30	16040
2007-12-31	9660
2008-03-31	7926
2008-06-30	12072
2008-09-30	10379
2008-12-31	12553
2009-03-31	10833
2009-06-30	10444
2009-09-30	8751
2009-12-31	9954
2010-03-31	10966
2010-06-30	10907
2010-09-30	11559
2010-12-31	10085
2011-03-31	10354
2011-06-30	14529
2011-09-30	11038
2011-12-31	14419
2012-03-31	12091
2012-06-30	11043
2012-09-30	10222
2012-12-31	9778
2013-03-31	8410
2013-06-30	7700
2013-09-30	9749
2013-12-31	9809
2014-03-31	9289
2014-06-30	9277
2014-09-30	5711
2014-12-31	7145
2015-03-31	8525
2015-06-30	7440
2015-09-30	7890
2015-12-31	5225
2016-03-31	6073
2016-06-30	5088
2016-09-30	3749
2016-12-31	2732
2017-03-31	3332
2017-06-30	3594
2017-09-30	3012
2017-12-31	3025
2018-03-31	3660
2018-06-30	3434
2018-09-30	5231
2018-12-31	4559
2019-03-31	4237
2019-06-30	5570
2019-09-30	4266
2019-12-31	3620
2020-03-31	3617
2020-06-30	2294
2020-09-30	6430
2020-12-31	4698
2021-03-31	6884
2021-06-30	5402
2021-09-30	6058
2021-12-31	6385
2022-03-31	5758
2022-06-30	9246
2022-09-30	6489
2022-12-31	8578
2023-03-31	6446
2023-06-30	6671
2023-09-30	7433