Quarter	US dollars
2004-12-31	50225
2005-03-31	58646
2005-06-30	57731
2005-09-30	64934
2005-12-31	65184
2006-03-31	74657
2006-06-30	72236
2006-09-30	73861
2006-12-31	77529
2007-03-31	64731
2007-06-30	72557
2007-09-30	97704
2007-12-31	90214
2008-03-31	91141
2008-06-30	83393
2008-09-30	93665
2008-12-31	84272
2009-03-31	79153
2009-06-30	74931
2009-09-30	76088
2009-12-31	73882
2010-03-31	75187
2010-06-30	73187
2010-09-30	68758
2010-12-31	69148
2011-03-31	70962
2011-06-30	63612
2011-09-30	57138
2011-12-31	55836
2012-03-31	50554
2012-06-30	53657
2012-09-30	51271
2012-12-31	47440
2013-03-31	46093
2013-06-30	40237
2013-09-30	39125
2013-12-31	39125
2014-03-31	38826
2014-06-30	45463
2014-09-30	46126
2014-12-31	47533
2015-03-31	48358
2015-06-30	43469
2015-09-30	51759
2015-12-31	44867
2016-03-31	42697
2016-06-30	44396
2016-09-30	45458
2016-12-31	44678
2017-03-31	49320
2017-06-30	51362
2017-09-30	52324
2017-12-31	56765
2018-03-31	40374
2018-06-30	35257
2018-09-30	40216
2018-12-31	33835
2019-03-31	34701
2019-06-30	39204
2019-09-30	42540
2019-12-31	47169
2020-03-31	52508
2020-06-30	39963
2020-09-30	30870
2020-12-31	31188
2021-03-31	35827
2021-06-30	33718
2021-09-30	32262
2021-12-31	51690
2022-03-31	44524
2022-06-30	41414
2022-09-30	28459
2022-12-31	28303
2023-03-31	34741
2023-06-30	36352
2023-09-30	39750