Quarter	US dollars
2004-12-31	3934
2005-03-31	4497
2005-06-30	4194
2005-09-30	5161
2005-12-31	3030
2006-03-31	2588
2006-06-30	2428
2006-09-30	2320
2006-12-31	1742
2007-03-31	3032
2007-06-30	3068
2007-09-30	2620
2007-12-31	2144
2008-03-31	2806
2008-06-30	2171
2008-09-30	1303
2008-12-31	1485
2009-03-31	1369
2009-06-30	1527
2009-09-30	1679
2009-12-31	2463
2010-03-31	2119
2010-06-30	1652
2010-09-30	3183
2010-12-31	2663
2011-03-31	3469
2011-06-30	1676
2011-09-30	2326
2011-12-31	3431
2012-03-31	2316
2012-06-30	1870
2012-09-30	1920
2012-12-31	2684
2013-03-31	2576
2013-06-30	2979
2013-09-30	2933
2013-12-31	3482
2014-03-31	4745
2014-06-30	4096
2014-09-30	4220
2014-12-31	5478
2015-03-31	6117
2015-06-30	5065
2015-09-30	4741
2015-12-31	2939
2016-03-31	3497
2016-06-30	4560
2016-09-30	2718
2016-12-31	1628
2017-03-31	1950
2017-06-30	2612
2017-09-30	2558
2017-12-31	2398
2018-03-31	3202
2018-06-30	2148
2018-09-30	3050
2018-12-31	2798
2019-03-31	2718
2019-06-30	2333
2019-09-30	2308
2019-12-31	3421
2020-03-31	4688
2020-06-30	3039
2020-09-30	4417
2020-12-31	5168
2021-03-31	5626
2021-06-30	4750
2021-09-30	5239
2021-12-31	5048
2022-03-31	6203
2022-06-30	4929
2022-09-30	5878
2022-12-31	4844
2023-03-31	5666
2023-06-30	5663
2023-09-30	7347