Quarter	US dollars
2004-12-31	8231
2005-03-31	6713
2005-06-30	6535
2005-09-30	7151
2005-12-31	4628
2006-03-31	7854
2006-06-30	8613
2006-09-30	9076
2006-12-31	9100
2007-03-31	9748
2007-06-30	8812
2007-09-30	8903
2007-12-31	8814
2008-03-31	9071
2008-06-30	6100
2008-09-30	9028
2008-12-31	5932
2009-03-31	5383
2009-06-30	4124
2009-09-30	5425
2009-12-31	5259
2010-03-31	6561
2010-06-30	7756
2010-09-30	6964
2010-12-31	5559
2011-03-31	7098
2011-06-30	6455
2011-09-30	10544
2011-12-31	6931
2012-03-31	6765
2012-06-30	5670
2012-09-30	6311
2012-12-31	5966
2013-03-31	4720
2013-06-30	4623
2013-09-30	4764
2013-12-31	4767
2014-03-31	5012
2014-06-30	5141
2014-09-30	5802
2014-12-31	5350
2015-03-31	6087
2015-06-30	4989
2015-09-30	4983
2015-12-31	4367
2016-03-31	5006
2016-06-30	5789
2016-09-30	5635
2016-12-31	4283
2017-03-31	4465
2017-06-30	5121
2017-09-30	3326
2017-12-31	2874
2018-03-31	3403
2018-06-30	3494
2018-09-30	2950
2018-12-31	1904
2019-03-31	3942
2019-06-30	1968
2019-09-30	2933
2019-12-31	2004
2020-03-31	3335
2020-06-30	3448
2020-09-30	2935
2020-12-31	2304
2021-03-31	3885
2021-06-30	3973
2021-09-30	4749
2021-12-31	2383
2022-03-31	3079
2022-06-30	2494
2022-09-30	3766
2022-12-31	1929
2023-03-31	2704
2023-06-30	3564
2023-09-30	3336