Quarter	US dollars
2004-12-31	6752
2005-03-31	5548
2005-06-30	4779
2005-09-30	4521
2005-12-31	4564
2006-03-31	5013
2006-06-30	4468
2006-09-30	3877
2006-12-31	5284
2007-03-31	4997
2007-06-30	5036
2007-09-30	5454
2007-12-31	6942
2008-03-31	5690
2008-06-30	7626
2008-09-30	6772
2008-12-31	7753
2009-03-31	6840
2009-06-30	6180
2009-09-30	5490
2009-12-31	4131
2010-03-31	3632
2010-06-30	3938
2010-09-30	4087
2010-12-31	4407
2011-03-31	5120
2011-06-30	5753
2011-09-30	4072
2011-12-31	3748
2012-03-31	3954
2012-06-30	4114
2012-09-30	4544
2012-12-31	4804
2013-03-31	5186
2013-06-30	5952
2013-09-30	6921
2013-12-31	6365
2014-03-31	5100
2014-06-30	4455
2014-09-30	6232
2014-12-31	6526
2015-03-31	6016
2015-06-30	7366
2015-09-30	6783
2015-12-31	5504
2016-03-31	5571
2016-06-30	5029
2016-09-30	5658
2016-12-31	9209
2017-03-31	6080
2017-06-30	5606
2017-09-30	5825
2017-12-31	6701
2018-03-31	4928
2018-06-30	5310
2018-09-30	5398
2018-12-31	6563
2019-03-31	7269
2019-06-30	7900
2019-09-30	8649
2019-12-31	9409
2020-03-31	10690
2020-06-30	9242
2020-09-30	8911
2020-12-31	7521
2021-03-31	11176
2021-06-30	10592
2021-09-30	10391
2021-12-31	8460
2022-03-31	8941
2022-06-30	5828
2022-09-30	4564
2022-12-31	5702
2023-03-31	6331
2023-06-30	6675
2023-09-30	6382