Quarter	US dollars
2004-12-31	5679
2005-03-31	7066
2005-06-30	6722
2005-09-30	7068
2005-12-31	4367
2006-03-31	8525
2006-06-30	8280
2006-09-30	8444
2006-12-31	10084
2007-03-31	13619
2007-06-30	9873
2007-09-30	9431
2007-12-31	11470
2008-03-31	14391
2008-06-30	10042
2008-09-30	8210
2008-12-31	5020
2009-03-31	3523
2009-06-30	4000
2009-09-30	3682
2009-12-31	3336
2010-03-31	2785
2010-06-30	2750
2010-09-30	1914
2010-12-31	1304
2011-03-31	1882
2011-06-30	1830
2011-09-30	1179
2011-12-31	1190
2012-03-31	1087
2012-06-30	2180
2012-09-30	2064
2012-12-31	2273
2013-03-31	2039
2013-06-30	2111
2013-09-30	1870
2013-12-31	2026
2014-03-31	1854
2014-06-30	1899
2014-09-30	2190
2014-12-31	2059
2015-03-31	1945
2015-06-30	2049
2015-09-30	1851
2015-12-31	1726
2016-03-31	2050
2016-06-30	1967
2016-09-30	768
2016-12-31	1758
2017-03-31	1528
2017-06-30	2529
2017-09-30	2750
2017-12-31	2270
2018-03-31	1662
2018-06-30	2559
2018-09-30	1840
2018-12-31	1659
2019-03-31	1971
2019-06-30	1624
2019-09-30	1112
2019-12-31	631
2020-03-31	540
2020-06-30	394
2020-09-30	415
2020-12-31	347
2021-03-31	455
2021-06-30	439
2021-09-30	458
2021-12-31	687
2022-03-31	1216
2022-06-30	1168
2022-09-30	1284
2022-12-31	1373
2023-03-31	1403
2023-06-30	1573
2023-09-30	1818