Quarter	US dollars
2004-12-31	3688
2005-03-31	3836
2005-06-30	3745
2005-09-30	3775
2005-12-31	3328
2006-03-31	3819
2006-06-30	6750
2006-09-30	8489
2006-12-31	7613
2007-03-31	8783
2007-06-30	9520
2007-09-30	9028
2007-12-31	9094
2008-03-31	9627
2008-06-30	9966
2008-09-30	9292
2008-12-31	5763
2009-03-31	5972
2009-06-30	6979
2009-09-30	6322
2009-12-31	6680
2010-03-31	5348
2010-06-30	6251
2010-09-30	6805
2010-12-31	5241
2011-03-31	6923
2011-06-30	5504
2011-09-30	4881
2011-12-31	4896
2012-03-31	5756
2012-06-30	5278
2012-09-30	6162
2012-12-31	6521
2013-03-31	5814
2013-06-30	5627
2013-09-30	5522
2013-12-31	5424
2014-03-31	5756
2014-06-30	6051
2014-09-30	6125
2014-12-31	7924
2015-03-31	6105
2015-06-30	5626
2015-09-30	6378
2015-12-31	6187
2016-03-31	5945
2016-06-30	5983
2016-09-30	5889
2016-12-31	5848
2017-03-31	6566
2017-06-30	5923
2017-09-30	6091
2017-12-31	5504
2018-03-31	5182
2018-06-30	4518
2018-09-30	4581
2018-12-31	4570
2019-03-31	4782
2019-06-30	5901
2019-09-30	5904
2019-12-31	7460
2020-03-31	7016
2020-06-30	5861
2020-09-30	6419
2020-12-31	6227
2021-03-31	5957
2021-06-30	5941
2021-09-30	5825
2021-12-31	5883
2022-03-31	5340
2022-06-30	5878
2022-09-30	6240
2022-12-31	6454
2023-03-31	6498
2023-06-30	5539
2023-09-30	5235