Quarter	US dollars
2004-12-31	2421
2005-03-31	4441
2005-06-30	3166
2005-09-30	2034
2005-12-31	2971
2006-03-31	5268
2006-06-30	4570
2006-09-30	6655
2006-12-31	6395
2007-03-31	7402
2007-06-30	9984
2007-09-30	12120
2007-12-31	13691
2008-03-31	12205
2008-06-30	7849
2008-09-30	6515
2008-12-31	7355
2009-03-31	5669
2009-06-30	5349
2009-09-30	6129
2009-12-31	5581
2010-03-31	6693
2010-06-30	10831
2010-09-30	9102
2010-12-31	8451
2011-03-31	9060
2011-06-30	9043
2011-09-30	24031
2011-12-31	20838
2012-03-31	20801
2012-06-30	33320
2012-09-30	47436
2012-12-31	56074
2013-03-31	57020
2013-06-30	53248
2013-09-30	53343
2013-12-31	50802
2014-03-31	42591
2014-06-30	31573
2014-09-30	44204
2014-12-31	32688
2015-03-31	31295
2015-06-30	33998
2015-09-30	33705
2015-12-31	30271
2016-03-31	29652
2016-06-30	40652
2016-09-30	42338
2016-12-31	31718
2017-03-31	34267
2017-06-30	34651
2017-09-30	26154
2017-12-31	27847
2018-03-31	19883
2018-06-30	19770
2018-09-30	23239
2018-12-31	24801
2019-03-31	32303
2019-06-30	21260
2019-09-30	35511
2019-12-31	38411
2020-03-31	23362
2020-06-30	37445
2020-09-30	46435
2020-12-31	53444
2021-03-31	52519
2021-06-30	43032
2021-09-30	37255
2021-12-31	51231
2022-03-31	33483
2022-06-30	12310
2022-09-30	11114
2022-12-31	8062
2023-03-31	8034
2023-06-30	13373
2023-09-30	9694