Quarter	US dollars
2004-12-31	4535
2005-03-31	4378
2005-06-30	4419
2005-09-30	4282
2005-12-31	4075
2006-03-31	4019
2006-06-30	4363
2006-09-30	4388
2006-12-31	4742
2007-03-31	4878
2007-06-30	5508
2007-09-30	5642
2007-12-31	6889
2008-03-31	8151
2008-06-30	6653
2008-09-30	5938
2008-12-31	6323
2009-03-31	6023
2009-06-30	6289
2009-09-30	6498
2009-12-31	6333
2010-03-31	6033
2010-06-30	7647
2010-09-30	8219
2010-12-31	8065
2011-03-31	8366
2011-06-30	8339
2011-09-30	8464
2011-12-31	7772
2012-03-31	7786
2012-06-30	5327
2012-09-30	5110
2012-12-31	4794
2013-03-31	4396
2013-06-30	4347
2013-09-30	3859
2013-12-31	4178
2014-03-31	4258
2014-06-30	3953
2014-09-30	3521
2014-12-31	3442
2015-03-31	3048
2015-06-30	2850
2015-09-30	2881
2015-12-31	2589
2016-03-31	2628
2016-06-30	2510
2016-09-30	2423
2016-12-31	2219
2017-03-31	1901
2017-06-30	1516
2017-09-30	1500
2017-12-31	1456
2018-03-31	1328
2018-06-30	1367
2018-09-30	1144
2018-12-31	1053
2019-03-31	1054
2019-06-30	1559
2019-09-30	1594
2019-12-31	1485
2020-03-31	1545
2020-06-30	766
2020-09-30	932
2020-12-31	1604
2021-03-31	1424
2021-06-30	1101
2021-09-30	1170
2021-12-31	1089
2022-03-31	986
2022-06-30	187
2022-09-30	537
2022-12-31	316
2023-03-31	621
2023-06-30	460
2023-09-30	1015