Quarter	US dollars
2004-12-31	3711
2005-03-31	5091
2005-06-30	5338
2005-09-30	13271
2005-12-31	14018
2006-03-31	15900
2006-06-30	15709
2006-09-30	16804
2006-12-31	22192
2007-03-31	22971
2007-06-30	23860
2007-09-30	26529
2007-12-31	28826
2008-03-31	27481
2008-06-30	30652
2008-09-30	26427
2008-12-31	20443
2009-03-31	21022
2009-06-30	21507
2009-09-30	22328
2009-12-31	23708
2010-03-31	18410
2010-06-30	22576
2010-09-30	25447
2010-12-31	24154
2011-03-31	25850
2011-06-30	22453
2011-09-30	20980
2011-12-31	19444
2012-03-31	19094
2012-06-30	18473
2012-09-30	18282
2012-12-31	16229
2013-03-31	17531
2013-06-30	16168
2013-09-30	16238
2013-12-31	14897
2014-03-31	16370
2014-06-30	17280
2014-09-30	16666
2014-12-31	14565
2015-03-31	12544
2015-06-30	13956
2015-09-30	11200
2015-12-31	10250
2016-03-31	10471
2016-06-30	11112
2016-09-30	4895
2016-12-31	5654
2017-03-31	4499
2017-06-30	4647
2017-09-30	4329
2017-12-31	4661
2018-03-31	4750
2018-06-30	4686
2018-09-30	6548
2018-12-31	6141
2019-03-31	4339
2019-06-30	4200
2019-09-30	5206
2019-12-31	4758
2020-03-31	3065
2020-06-30	2081
2020-09-30	3258
2020-12-31	4477
2021-03-31	3769
2021-06-30	4103
2021-09-30	3653
2021-12-31	4054
2022-03-31	3677
2022-06-30	3685
2022-09-30	3592
2022-12-31	4140
2023-03-31	3565
2023-06-30	3613
2023-09-30	3950