Quarter	US dollars
2004-12-31	1876
2005-03-31	1815
2005-06-30	1506
2005-09-30	1551
2005-12-31	1422
2006-03-31	1735
2006-06-30	1727
2006-09-30	1909
2006-12-31	3438
2007-03-31	3560
2007-06-30	3136
2007-09-30	4403
2007-12-31	5340
2008-03-31	5670
2008-06-30	5726
2008-09-30	5425
2008-12-31	5988
2009-03-31	6615
2009-06-30	6777
2009-09-30	6859
2009-12-31	5392
2010-03-31	7078
2010-06-30	6426
2010-09-30	8902
2010-12-31	8670
2011-03-31	6659
2011-06-30	5355
2011-09-30	6417
2011-12-31	7352
2012-03-31	6648
2012-06-30	7275
2012-09-30	7198
2012-12-31	7665
2013-03-31	9403
2013-06-30	7966
2013-09-30	8356
2013-12-31	8477
2014-03-31	9599
2014-06-30	8419
2014-09-30	7873
2014-12-31	7888
2015-03-31	8631
2015-06-30	6395
2015-09-30	5963
2015-12-31	5544
2016-03-31	6643
2016-06-30	6282
2016-09-30	6177
2016-12-31	6747
2017-03-31	6773
2017-06-30	5171
2017-09-30	4737
2017-12-31	4806
2018-03-31	5645
2018-06-30	5830
2018-09-30	6106
2018-12-31	4841
2019-03-31	4657
2019-06-30	4345
2019-09-30	4355
2019-12-31	4281
2020-03-31	3974
2020-06-30	5418
2020-09-30	5026
2020-12-31	4761
2021-03-31	5356
2021-06-30	5874
2021-09-30	5462
2021-12-31	5920
2022-03-31	5637
2022-06-30	5897
2022-09-30	5550
2022-12-31	4621
2023-03-31	4724
2023-06-30	4799
2023-09-30	5308