Quarter	US dollars
2004-12-31	5454
2005-03-31	6418
2005-06-30	5462
2005-09-30	7510
2005-12-31	5574
2006-03-31	7571
2006-06-30	7817
2006-09-30	8870
2006-12-31	12488
2007-03-31	8489
2007-06-30	10933
2007-09-30	11939
2007-12-31	27098
2008-03-31	24285
2008-06-30	36276
2008-09-30	30036
2008-12-31	10602
2009-03-31	15254
2009-06-30	20177
2009-09-30	23838
2009-12-31	17908
2010-03-31	15780
2010-06-30	14049
2010-09-30	14567
2010-12-31	15210
2011-03-31	13162
2011-06-30	15268
2011-09-30	17827
2011-12-31	11999
2012-03-31	17796
2012-06-30	18274
2012-09-30	22972
2012-12-31	17182
2013-03-31	18859
2013-06-30	18264
2013-09-30	17242
2013-12-31	16826
2014-03-31	5847
2014-06-30	7612
2014-09-30	6876
2014-12-31	5093
2015-03-31	5093
2015-06-30	5279
2015-09-30	3508
2015-12-31	4604
2016-03-31	5697
2016-06-30	6368
2016-09-30	6772
2016-12-31	7397
2017-03-31	7664
2017-06-30	8211
2017-09-30	8392
2017-12-31	7890
2018-03-31	8465
2018-06-30	7697
2018-09-30	7252
2018-12-31	8027
2019-03-31	8195
2019-06-30	7427
2019-09-30	8315
2019-12-31	8790
2020-03-31	8899
2020-06-30	9205
2020-09-30	10427
2020-12-31	12472
2021-03-31	11689
2021-06-30	14405
2021-09-30	14189
2021-12-31	12780
2022-03-31	12912
2022-06-30	15527
2022-09-30	12405
2022-12-31	12158
2023-03-31	10201
2023-06-30	11851
2023-09-30	11443