Quarter	US dollars
2004-12-31	10897
2005-03-31	6526
2005-06-30	7405
2005-09-30	7015
2005-12-31	4810
2006-03-31	7271
2006-06-30	6996
2006-09-30	7342
2006-12-31	7748
2007-03-31	6710
2007-06-30	4679
2007-09-30	7335
2007-12-31	8206
2008-03-31	7785
2008-06-30	6014
2008-09-30	14579
2008-12-31	7915
2009-03-31	7739
2009-06-30	6052
2009-09-30	8907
2009-12-31	7864
2010-03-31	11302
2010-06-30	10560
2010-09-30	10797
2010-12-31	7884
2011-03-31	8634
2011-06-30	6623
2011-09-30	14886
2011-12-31	8347
2012-03-31	8585
2012-06-30	7451
2012-09-30	8801
2012-12-31	8357
2013-03-31	7568
2013-06-30	9243
2013-09-30	6873
2013-12-31	7084
2014-03-31	6924
2014-06-30	7336
2014-09-30	7764
2014-12-31	6175
2015-03-31	8518
2015-06-30	6435
2015-09-30	6524
2015-12-31	5196
2016-03-31	5990
2016-06-30	6079
2016-09-30	5669
2016-12-31	4441
2017-03-31	4519
2017-06-30	5587
2017-09-30	3163
2017-12-31	3948
2018-03-31	4527
2018-06-30	4364
2018-09-30	3568
2018-12-31	2459
2019-03-31	3132
2019-06-30	2875
2019-09-30	3620
2019-12-31	3271
2020-03-31	4881
2020-06-30	4725
2020-09-30	4593
2020-12-31	4123
2021-03-31	5231
2021-06-30	5669
2021-09-30	6915
2021-12-31	4557
2022-03-31	5774
2022-06-30	4760
2022-09-30	6273
2022-12-31	4914
2023-03-31	6079
2023-06-30	5855
2023-09-30	5504