Quarter	US dollars
2004-12-31	6871
2005-03-31	7509
2005-06-30	7901
2005-09-30	8644
2006-03-31	9373
2006-06-30	9321
2006-09-30	10073
2006-12-31	12396
2007-03-31	12711
2007-06-30	14721
2007-09-30	15674
2007-12-31	15210
2008-03-31	15866
2008-06-30	17284
2008-09-30	18833
2008-12-31	15615
2009-06-30	14080
2009-09-30	14155
2009-12-31	13947
2010-03-31	14535
2010-06-30	14800
2010-09-30	15089
2010-12-31	12789
2011-03-31	13311
2011-06-30	14012
2011-09-30	13440
2011-12-31	13521
2012-03-31	14190
2012-06-30	14492
2012-09-30	14941
2012-12-31	14621
2013-03-31	15151
2013-06-30	14817
2013-09-30	14814
2013-12-31	15629
2014-03-31	15791
2014-06-30	16699
2014-09-30	16332
2014-12-31	15983
2015-03-31	15319
2015-06-30	14074
2015-09-30	13525
2015-12-31	13104
2016-03-31	13487
2016-06-30	12098
2016-09-30	13240
2016-12-31	14618
2017-03-31	16627
2017-06-30	11717
2017-09-30	12967
2017-12-31	15254
2018-03-31	11468
2018-06-30	10903
2018-09-30	10730
2018-12-31	11025
2019-03-31	11593
2019-06-30	11098
2019-09-30	10653
2019-12-31	11691
2020-03-31	11530
2020-06-30	11070
2020-09-30	8951
2020-12-31	6306
2021-03-31	6726
2021-06-30	5336
2021-09-30	5457
2021-12-31	5906
2022-03-31	4815
2022-06-30	4698
2022-09-30	3838
2022-12-31	3879
2023-03-31	4437
2023-06-30	4540
2023-09-30	4245