Quarter	US dollars
2004-12-31	7956
2005-03-31	10535
2005-06-30	7643
2005-09-30	7843
2005-12-31	3423
2006-03-31	4092
2006-06-30	3980
2006-09-30	6068
2006-12-31	5529
2007-03-31	4742
2007-06-30	7540
2007-09-30	6799
2007-12-31	2313
2008-03-31	2552
2008-06-30	3453
2008-09-30	6093
2008-12-31	4912
2009-03-31	9222
2009-06-30	6327
2009-09-30	10389
2009-12-31	6298
2010-03-31	5333
2010-06-30	5496
2010-09-30	5818
2010-12-31	5066
2011-03-31	5258
2011-06-30	5510
2011-09-30	6295
2011-12-31	5909
2012-03-31	8312
2012-06-30	8880
2012-09-30	9752
2012-12-31	9369
2013-03-31	8999
2013-06-30	8814
2013-09-30	7381
2013-12-31	6180
2014-03-31	9650
2014-06-30	12590
2014-09-30	8158
2014-12-31	6382
2015-03-31	6849
2015-06-30	7419
2015-09-30	6447
2015-12-31	5565
2016-03-31	4978
2016-06-30	4227
2016-09-30	4022
2016-12-31	2282
2017-03-31	2320
2017-06-30	3224
2017-09-30	3451
2017-12-31	3376
2018-03-31	5926
2018-06-30	5045
2018-09-30	4114
2018-12-31	4311
2019-03-31	5450
2019-06-30	3459
2019-09-30	1993
2019-12-31	2602
2020-03-31	2366
2020-06-30	3810
2020-09-30	2582
2020-12-31	2420
2021-03-31	2481
2021-06-30	2304
2021-09-30	3119
2021-12-31	2565
2022-03-31	3579
2022-06-30	3235
2022-09-30	2250
2022-12-31	1650
2023-03-31	1199
2023-06-30	2960
2023-09-30	2497