Quarter	US dollars
2004-12-31	2928
2005-03-31	3221
2005-06-30	3287
2005-09-30	3078
2005-12-31	3677
2006-03-31	4501
2006-06-30	5136
2006-09-30	6135
2006-12-31	5851
2007-03-31	5915
2007-06-30	6477
2007-09-30	7214
2007-12-31	6974
2008-03-31	10428
2008-06-30	9146
2008-09-30	8809
2008-12-31	6557
2009-03-31	5472
2009-06-30	5563
2009-09-30	6033
2009-12-31	5810
2010-03-31	5421
2010-06-30	7611
2010-09-30	7736
2010-12-31	10486
2011-03-31	12665
2011-06-30	12829
2011-09-30	9807
2011-12-31	13128
2012-03-31	14834
2012-06-30	18216
2012-09-30	16078
2012-12-31	15990
2013-03-31	16937
2013-06-30	19524
2013-09-30	18670
2013-12-31	21359
2014-03-31	23404
2014-06-30	23537
2014-09-30	21426
2014-12-31	19936
2015-03-31	18336
2015-06-30	16140
2015-09-30	15642
2015-12-31	12758
2016-03-31	11623
2016-06-30	11463
2016-09-30	11457
2016-12-31	9435
2017-03-31	9125
2017-06-30	11127
2017-09-30	9276
2017-12-31	8706
2018-03-31	9707
2018-06-30	9102
2018-09-30	8264
2018-12-31	6724
2019-03-31	6813
2019-06-30	8434
2019-09-30	6759
2019-12-31	5925
2020-03-31	5511
2020-06-30	4416
2020-09-30	5945
2020-12-31	5898
2021-03-31	6997
2021-06-30	7070
2021-09-30	6277
2021-12-31	5977
2022-03-31	6024
2022-06-30	6168
2022-09-30	5336
2022-12-31	5448
2023-03-31	6009
2023-06-30	6238
2023-09-30	6096