Quarter	US dollars
2004-12-31	4711
2005-03-31	4512
2005-06-30	4397
2005-09-30	3702
2005-12-31	4044
2006-03-31	4645
2006-06-30	4697
2006-09-30	4415
2006-12-31	4926
2007-03-31	5821
2007-06-30	5861
2007-09-30	5800
2007-12-31	6827
2008-03-31	5972
2008-06-30	6072
2008-09-30	6132
2008-12-31	6888
2009-03-31	5499
2009-06-30	6273
2009-09-30	4897
2009-12-31	4831
2010-03-31	6561
2010-06-30	4083
2010-09-30	4159
2010-12-31	3203
2011-03-31	3155
2011-06-30	4199
2011-09-30	2636
2011-12-31	2645
2012-03-31	3086
2012-06-30	2902
2012-09-30	3015
2012-12-31	2849
2013-03-31	2862
2013-06-30	2553
2013-09-30	2465
2013-12-31	2393
2014-03-31	2017
2014-06-30	1881
2014-09-30	1931
2014-12-31	1567
2015-03-31	1630
2015-06-30	1631
2015-09-30	1749
2015-12-31	1420
2016-03-31	1501
2016-06-30	881
2016-09-30	915
2016-12-31	924
2017-03-31	827
2017-06-30	866
2017-09-30	873
2017-12-31	1067
2018-03-31	1061
2018-06-30	948
2018-09-30	1268
2018-12-31	730
2019-03-31	1207
2019-06-30	1170
2019-09-30	1122
2019-12-31	1007
2020-03-31	1037
2020-06-30	1163
2020-09-30	1091
2020-12-31	1132
2021-03-31	968
2021-06-30	772
2021-09-30	1142
2021-12-31	783
2022-03-31	836
2022-06-30	950
2022-09-30	848
2022-12-31	907
2023-03-31	1341
2023-06-30	1583
2023-09-30	1592