Quarter	US dollars
2004-12-31	1208
2005-03-31	1480
2005-06-30	1201
2005-09-30	1551
2005-12-31	1439
2006-03-31	1466
2006-06-30	2103
2006-09-30	1767
2006-12-31	1209
2007-03-31	1383
2007-06-30	1386
2007-09-30	1856
2007-12-31	2055
2008-03-31	2910
2008-06-30	2802
2008-09-30	3133
2008-12-31	2915
2009-03-31	2326
2009-06-30	2574
2009-09-30	2025
2009-12-31	2186
2010-03-31	2827
2010-06-30	3926
2010-09-30	3102
2010-12-31	5295
2011-03-31	8257
2011-06-30	7741
2011-09-30	6344
2011-12-31	8989
2012-03-31	8301
2012-06-30	11040
2012-09-30	10025
2012-12-31	10752
2013-03-31	13098
2013-06-30	16547
2013-09-30	15543
2013-12-31	16348
2014-03-31	14724
2014-06-30	16907
2014-09-30	15123
2014-12-31	14391
2015-03-31	13322
2015-06-30	11029
2015-09-30	9741
2015-12-31	8912
2016-03-31	9104
2016-06-30	8333
2016-09-30	8479
2016-12-31	6861
2017-03-31	6691
2017-06-30	8175
2017-09-30	6279
2017-12-31	5671
2018-03-31	6691
2018-06-30	6361
2018-09-30	5313
2018-12-31	4290
2019-03-31	4987
2019-06-30	5649
2019-09-30	5083
2019-12-31	4609
2020-03-31	4016
2020-06-30	3666
2020-09-30	4473
2020-12-31	4697
2021-03-31	5655
2021-06-30	5816
2021-09-30	5859
2021-12-31	5433
2022-03-31	5349
2022-06-30	5799
2022-09-30	4871
2022-12-31	5281
2023-03-31	5986
2023-06-30	6630
2023-09-30	6178