Quarter	US dollars
2004-12-31	4546
2005-03-31	5437
2005-06-30	5775
2005-09-30	5839
2005-12-31	6013
2006-03-31	6697
2006-06-30	7083
2006-09-30	7150
2006-12-31	7959
2007-03-31	8271
2007-06-30	8156
2007-09-30	8663
2007-12-31	5107
2008-03-31	5050
2008-06-30	3990
2008-09-30	3671
2008-12-31	4708
2009-03-31	4411
2009-06-30	4234
2009-09-30	4798
2009-12-31	4588
2010-03-31	3749
2010-06-30	3326
2010-09-30	3832
2010-12-31	3494
2011-03-31	3599
2011-06-30	3561
2011-09-30	4438
2011-12-31	3389
2012-03-31	3877
2012-06-30	7619
2012-09-30	7819
2012-12-31	3898
2013-03-31	3912
2013-06-30	3519
2013-09-30	4798
2013-12-31	3367
2014-03-31	2299
2014-06-30	2522
2014-09-30	2594
2014-12-31	2380
2015-03-31	3462
2015-06-30	3297
2015-09-30	3460
2015-12-31	3321
2016-03-31	3666
2016-06-30	3847
2016-09-30	3926
2016-12-31	3145
2017-03-31	3037
2017-06-30	2619
2017-09-30	1601
2017-12-31	1894
2018-03-31	2001
2018-06-30	1860
2018-09-30	1934
2018-12-31	1878
2019-03-31	2164
2019-06-30	2148
2019-09-30	1789
2019-12-31	1565
2020-03-31	1481
2020-06-30	1680
2020-09-30	1778
2020-12-31	1664
2021-03-31	1643
2021-06-30	1394
2021-09-30	1629
2021-12-31	1784
2022-03-31	2105
2022-06-30	1778
2022-09-30	1582
2022-12-31	1338
2023-03-31	1347
2023-06-30	1326
2023-09-30	1465