Quarter	US dollars
2004-12-31	25792
2005-03-31	27630
2005-06-30	28176
2005-09-30	27728
2005-12-31	26147
2006-03-31	32931
2006-06-30	34795
2006-09-30	38377
2006-12-31	39363
2007-03-31	43545
2007-06-30	43280
2007-09-30	55051
2007-12-31	50925
2008-03-31	52734
2008-06-30	53731
2008-09-30	46377
2008-12-31	45026
2009-03-31	35297
2009-06-30	41280
2009-09-30	38717
2009-12-31	33449
2010-03-31	28189
2010-06-30	28606
2010-09-30	30194
2010-12-31	29337
2011-03-31	28101
2011-06-30	30142
2011-09-30	25797
2011-12-31	20798
2012-03-31	19419
2012-06-30	17782
2012-09-30	19327
2012-12-31	20144
2013-03-31	18422
2013-06-30	19456
2013-09-30	20393
2013-12-31	19829
2014-03-31	16493
2014-06-30	17516
2014-09-30	14554
2014-12-31	14372
2015-03-31	12626
2015-06-30	11735
2015-09-30	11347
2015-12-31	12285
2016-03-31	13058
2016-06-30	14100
2016-09-30	11148
2016-12-31	12109
2017-03-31	9878
2017-06-30	11252
2017-09-30	11975
2017-12-31	10401
2018-03-31	12572
2018-06-30	13591
2018-09-30	13333
2018-12-31	14291
2019-03-31	11762
2019-06-30	12491
2019-09-30	13668
2019-12-31	12038
2020-03-31	13599
2020-06-30	13272
2020-09-30	11979
2020-12-31	13145
2021-03-31	12368
2021-06-30	14209
2021-09-30	13580
2021-12-31	13768
2022-03-31	14615
2022-06-30	14496
2022-09-30	15359
2022-12-31	12493
2023-03-31	13921
2023-06-30	15585
2023-09-30	14058