Quarter	US dollars
2004-12-31	4886
2005-03-31	5080
2005-06-30	2700
2005-09-30	2485
2005-12-31	3517
2006-03-31	7274
2006-06-30	7988
2006-09-30	8381
2006-12-31	7215
2007-03-31	6494
2007-06-30	2871
2007-09-30	3223
2007-12-31	7295
2008-03-31	7578
2008-06-30	4615
2008-09-30	4393
2008-12-31	2086
2009-03-31	4458
2009-06-30	4912
2009-09-30	3856
2009-12-31	4169
2010-03-31	3275
2010-06-30	2662
2010-09-30	6258
2010-12-31	5244
2011-03-31	5546
2011-06-30	5329
2011-09-30	5203
2011-12-31	4702
2012-03-31	7530
2012-06-30	4050
2012-09-30	2655
2012-12-31	2441
2013-03-31	3926
2013-06-30	2287
2013-09-30	3001
2013-12-31	3666
2014-03-31	3290
2014-06-30	3965
2014-09-30	2668
2014-12-31	3059
2015-03-31	4031
2015-06-30	5785
2015-09-30	5763
2015-12-31	5274
2016-03-31	6720
2016-06-30	9567
2016-09-30	8785
2016-12-31	9030
2017-03-31	6013
2017-06-30	5451
2017-09-30	5103
2017-12-31	7036
2018-03-31	5683
2018-06-30	5980
2018-09-30	5618
2018-12-31	5958
2019-03-31	5048
2019-06-30	8302
2019-09-30	7321
2019-12-31	8227
2020-03-31	10143
2020-06-30	12145
2020-09-30	12737
2020-12-31	14356
2021-03-31	15658
2021-06-30	15824
2021-09-30	14107
2021-12-31	12885
2022-03-31	12921
2022-06-30	11491
2022-09-30	11301
2022-12-31	10093
2023-03-31	11292
2023-06-30	12605
2023-09-30	15271