Quarter	US dollars
2004-12-31	4516
2005-03-31	8221
2005-06-30	16242
2005-09-30	18981
2005-12-31	8834
2006-03-31	13276
2006-06-30	12119
2006-09-30	11798
2006-12-31	9722
2007-03-31	11811
2007-06-30	12452
2007-09-30	14034
2007-12-31	20490
2008-03-31	24754
2008-06-30	18669
2008-09-30	20612
2008-12-31	12825
2009-03-31	14757
2009-06-30	15715
2009-09-30	16919
2009-12-31	17459
2010-03-31	20519
2010-06-30	21141
2010-09-30	24625
2010-12-31	17634
2011-03-31	22040
2011-06-30	23456
2011-09-30	19182
2011-12-31	21362
2012-03-31	23602
2012-06-30	20215
2012-09-30	16214
2012-12-31	19408
2013-03-31	20781
2013-06-30	15636
2013-09-30	15300
2013-12-31	14219
2014-03-31	14574
2014-06-30	15984
2014-09-30	16875
2014-12-31	15463
2015-03-31	14557
2015-06-30	14081
2015-09-30	13036
2015-12-31	10655
2016-03-31	12138
2016-06-30	11339
2016-09-30	12661
2016-12-31	11297
2017-03-31	15389
2017-06-30	21114
2017-09-30	19887
2017-12-31	22455
2018-03-31	22551
2018-06-30	22143
2018-09-30	20892
2018-12-31	22056
2019-03-31	21631
2019-06-30	21935
2019-09-30	20922
2019-12-31	21707
2020-03-31	23101
2020-06-30	26419
2020-09-30	23894
2020-12-31	25702
2021-03-31	25212
2021-06-30	29638
2021-09-30	27065
2021-12-31	26369
2022-03-31	30785
2022-06-30	28363
2022-09-30	24908
2022-12-31	30636
2023-03-31	30388
2023-06-30	26870
2023-09-30	24858