Quarter	US dollars
2004-12-31	2348
2005-03-31	2006
2005-06-30	2380
2005-09-30	1521
2005-12-31	1890
2006-03-31	1863
2006-06-30	1664
2006-09-30	2158
2006-12-31	4480
2007-03-31	7506
2007-06-30	6559
2007-09-30	6992
2007-12-31	5973
2008-03-31	6487
2008-06-30	6130
2008-09-30	4685
2008-12-31	3928
2009-03-31	4365
2009-06-30	4519
2009-09-30	4460
2009-12-31	3775
2010-03-31	5638
2010-06-30	5442
2010-09-30	5558
2010-12-31	4906
2011-03-31	6598
2011-06-30	4973
2011-09-30	4847
2011-12-31	3700
2012-03-31	2626
2012-06-30	2406
2012-09-30	2346
2012-12-31	1821
2013-03-31	1556
2013-06-30	1611
2013-09-30	1485
2013-12-31	1377
2014-03-31	1879
2014-06-30	1534
2014-09-30	1310
2014-12-31	1039
2015-03-31	1243
2015-06-30	1247
2015-09-30	1407
2015-12-31	1472
2016-03-31	1456
2016-06-30	3258
2016-09-30	3180
2016-12-31	2837
2017-03-31	2187
2017-06-30	1960
2017-09-30	2313
2017-12-31	2240
2018-03-31	2174
2018-06-30	2248
2018-09-30	2097
2018-12-31	2090
2019-03-31	2620
2019-06-30	1548
2019-09-30	1370
2019-12-31	1602
2020-03-31	1439
2020-06-30	1212
2020-09-30	1037
2020-12-31	1116
2021-03-31	1024
2021-06-30	1159
2021-09-30	1104
2021-12-31	1317
2022-03-31	1242
2022-06-30	1484
2022-09-30	1421
2022-12-31	1521
2023-03-31	1542
2023-06-30	1471
2023-09-30	1384