Quarter	US dollars
2004-12-31	6159
2005-03-31	7626
2005-06-30	6973
2005-09-30	8775
2005-12-31	5931
2006-03-31	7498
2006-06-30	6064
2006-09-30	7297
2006-12-31	8793
2007-03-31	8906
2007-06-30	9318
2007-09-30	8582
2007-12-31	7687
2008-03-31	7910
2008-06-30	8032
2008-09-30	5646
2008-12-31	5218
2009-03-31	5639
2009-06-30	4588
2009-09-30	5028
2009-12-31	4744
2010-03-31	5008
2010-06-30	5445
2010-09-30	5886
2010-12-31	4016
2011-03-31	4722
2011-06-30	3428
2011-09-30	4334
2011-12-31	3272
2012-03-31	3236
2012-06-30	3260
2012-09-30	3307
2012-12-31	2985
2013-03-31	2535
2013-06-30	2868
2013-09-30	2800
2013-12-31	2264
2014-03-31	2273
2014-06-30	2881
2014-09-30	2354
2014-12-31	2689
2015-03-31	2318
2015-06-30	2064
2015-09-30	2092
2015-12-31	2306
2016-03-31	2375
2016-06-30	2417
2016-09-30	2527
2016-12-31	1649
2017-03-31	3741
2017-06-30	2794
2017-09-30	2212
2017-12-31	2116
2018-03-31	4256
2018-06-30	3342
2018-09-30	1964
2018-12-31	1513
2019-03-31	1667
2019-06-30	2679
2019-09-30	2288
2019-12-31	2139
2020-03-31	2575
2020-06-30	2775
2020-09-30	2817
2020-12-31	2532
2021-03-31	2634
2021-06-30	2787
2021-09-30	2615
2021-12-31	1507
2022-03-31	1649
2022-06-30	2581
2022-09-30	2819
2022-12-31	2711
2023-03-31	2669
2023-06-30	2791
2023-09-30	2983