Quarter	US dollars
2004-12-31	7445
2005-03-31	5425
2005-06-30	5634
2005-09-30	5956
2005-12-31	5424
2006-03-31	7068
2006-06-30	7246
2006-09-30	9442
2006-12-31	9607
2007-03-31	13780
2007-06-30	14418
2007-09-30	14195
2007-12-31	12354
2008-03-31	15367
2008-06-30	15841
2008-09-30	12109
2008-12-31	10707
2009-03-31	9433
2009-06-30	12761
2009-09-30	14405
2009-12-31	14541
2010-03-31	13544
2010-06-30	14405
2010-09-30	15216
2010-12-31	14082
2011-03-31	14177
2011-06-30	15072
2011-09-30	13745
2011-12-31	10983
2012-03-31	9950
2012-06-30	10467
2012-09-30	10972
2012-12-31	10503
2013-03-31	8940
2013-06-30	9475
2013-09-30	9417
2013-12-31	8358
2014-03-31	4937
2014-06-30	5389
2014-09-30	5514
2014-12-31	3910
2015-03-31	3679
2015-06-30	3198
2015-09-30	3407
2015-12-31	2891
2016-03-31	3481
2016-06-30	3928
2016-09-30	3579
2016-12-31	4445
2017-03-31	3422
2017-06-30	5234
2017-09-30	4351
2017-12-31	2575
2018-03-31	3616
2018-06-30	4702
2018-09-30	3974
2018-12-31	3870
2019-03-31	3863
2019-06-30	4541
2019-09-30	5163
2019-12-31	3999
2020-03-31	5137
2020-06-30	4444
2020-09-30	3199
2020-12-31	2730
2021-03-31	3448
2021-06-30	2924
2021-09-30	2892
2021-12-31	3236
2022-03-31	2748
2022-06-30	2715
2022-09-30	3185
2022-12-31	2904
2023-03-31	3447
2023-06-30	4567
2023-09-30	3780