Quarter	US dollars
2004-12-31	25341
2005-03-31	39880
2005-06-30	32030
2005-09-30	34186
2005-12-31	24251
2006-03-31	39271
2006-06-30	43686
2006-09-30	46065
2006-12-31	49838
2007-03-31	44392
2007-06-30	49036
2007-09-30	48270
2007-12-31	45303
2008-03-31	60148
2008-06-30	63011
2008-09-30	50154
2008-12-31	46975
2009-03-31	49121
2009-06-30	56994
2009-09-30	52147
2009-12-31	100783
2010-03-31	92156
2010-06-30	97856
2010-09-30	107870
2010-12-31	93330
2011-03-31	101201
2011-06-30	92518
2011-09-30	77557
2011-12-31	75264
2012-03-31	77676
2012-06-30	78508
2012-09-30	76059
2012-12-31	47561
2013-03-31	46647
2013-06-30	44822
2013-09-30	49353
2013-12-31	43548
2014-03-31	50918
2014-06-30	45362
2014-09-30	55597
2014-12-31	55658
2015-03-31	57424
2015-06-30	53136
2015-09-30	51606
2015-12-31	51567
2016-03-31	51768
2016-06-30	51700
2016-09-30	49287
2016-12-31	50049
2017-03-31	49944
2017-06-30	55566
2017-09-30	51625
2017-12-31	50322
2018-03-31	51689
2018-06-30	54358
2018-09-30	51505
2018-12-31	52362
2019-03-31	67243
2019-06-30	64211
2019-09-30	62131
2019-12-31	58839
2020-03-31	56664
2020-06-30	56954
2020-09-30	44435
2020-12-31	40912
2021-03-31	42827
2021-06-30	67871
2021-09-30	74839
2021-12-31	66567
2022-03-31	65565
2022-06-30	52844
2022-09-30	48452
2022-12-31	49369
2023-03-31	56129
2023-06-30	57488
2023-09-30	56215