Quarter	US dollars
2004-12-31	11646
2005-03-31	16014
2005-06-30	21241
2005-09-30	25165
2005-12-31	22278
2006-03-31	25405
2006-06-30	32807
2006-09-30	35182
2006-12-31	43361
2007-03-31	53798
2007-06-30	55732
2007-09-30	69272
2007-12-31	95786
2008-03-31	162446
2008-06-30	134397
2008-09-30	102285
2008-12-31	85665
2009-03-31	65537
2009-06-30	61454
2009-09-30	56252
2009-12-31	47270
2010-03-31	41128
2010-06-30	29314
2010-09-30	37623
2010-12-31	31235
2011-03-31	33299
2011-06-30	33498
2011-09-30	37567
2011-12-31	36742
2012-03-31	1163
2012-06-30	1352
2012-09-30	234
2012-12-31	-1014
2013-03-31	-91
2013-06-30	-323
2013-09-30	-24
2013-12-31	61
2014-03-31	137
2014-06-30	479
2014-09-30	-28
2014-12-31	951
2015-03-31	913
2015-06-30	826
2015-09-30	1012
2015-12-31	1227
2016-03-31	1500
2016-06-30	1006
2016-09-30	794
2016-12-31	963
2017-03-31	809
2017-06-30	1715
2017-09-30	1971
2017-12-31	1629
2018-03-31	338
2018-06-30	397
2018-09-30	811
2018-12-31	524
2019-03-31	597
2019-06-30	454
2019-09-30	94
2019-12-31	478
2020-03-31	-92
2020-06-30	702
2020-09-30	292
2020-12-31	25
2021-03-31	-182
2021-06-30	310
2021-09-30	996
2021-12-31	63
2022-03-31	-365
2022-06-30	76
2022-09-30	317
2022-12-31	96
2023-03-31	201
2023-06-30	298
2023-09-30	152