Quarter	US dollars
2004-12-31	9820
2005-03-31	8930
2005-06-30	12526
2005-09-30	10967
2005-12-31	9313
2006-03-31	7245
2006-06-30	7664
2006-09-30	5849
2006-12-31	4996
2007-03-31	9146
2007-06-30	12634
2007-09-30	13084
2007-12-31	14022
2008-03-31	19539
2008-06-30	22476
2008-09-30	20029
2008-12-31	44198
2009-03-31	36382
2009-06-30	28513
2009-09-30	28181
2009-12-31	24756
2010-03-31	25702
2010-06-30	26993
2010-09-30	29169
2010-12-31	23952
2011-03-31	16771
2011-06-30	19502
2011-09-30	26835
2011-12-31	27587
2012-03-31	27983
2012-06-30	26862
2012-09-30	19758
2012-12-31	17001
2013-03-31	17387
2013-06-30	12892
2013-09-30	12989
2013-12-31	11434
2014-03-31	16516
2014-06-30	17825
2014-09-30	19364
2014-12-31	22341
2015-03-31	23286
2015-06-30	19285
2015-09-30	19965
2015-12-31	17205
2016-03-31	21275
2016-06-30	21195
2016-09-30	22347
2016-12-31	17265
2017-03-31	15750
2017-06-30	13988
2017-09-30	13986
2017-12-31	9622
2018-03-31	9725
2018-06-30	5965
2018-09-30	6657
2018-12-31	9264
2019-03-31	11104
2019-06-30	7572
2019-09-30	8529
2019-12-31	7498
2020-03-31	8290
2020-06-30	7372
2020-09-30	7200
2020-12-31	7203
2021-03-31	5247
2021-06-30	5163
2021-09-30	4583
2021-12-31	4637
2022-03-31	3784
2022-06-30	3766
2022-09-30	3385
2022-12-31	1935
2023-03-31	1944
2023-06-30	1741
2023-09-30	1505