Quarter	US dollars
2004-12-31	10911
2005-03-31	11516
2005-06-30	12404
2005-09-30	14655
2005-12-31	19089
2006-03-31	23119
2006-06-30	27103
2006-09-30	28832
2006-12-31	31950
2007-03-31	39097
2007-06-30	52100
2007-09-30	53926
2007-12-31	54585
2008-03-31	56413
2008-06-30	61430
2008-09-30	58759
2008-12-31	54780
2009-03-31	49558
2009-06-30	45527
2009-09-30	45726
2009-12-31	47801
2010-03-31	40949
2010-06-30	34169
2010-09-30	38168
2010-12-31	44391
2011-03-31	43934
2011-06-30	49458
2011-09-30	63558
2011-12-31	56505
2012-03-31	48419
2012-06-30	46147
2012-09-30	44857
2012-12-31	55511
2013-03-31	106741
2013-06-30	100789
2013-09-30	93354
2013-12-31	85777
2014-03-31	80187
2014-06-30	78039
2014-09-30	70688
2014-12-31	60453
2015-03-31	50624
2015-06-30	50308
2015-09-30	48828
2015-12-31	44688
2016-03-31	50450
2016-06-30	45315
2016-09-30	44851
2016-12-31	41042
2017-03-31	42417
2017-06-30	34338
2017-09-30	35582
2017-12-31	37955
2018-03-31	25206
2018-06-30	23207
2018-09-30	29878
2018-12-31	25068
2019-03-31	25360
2019-06-30	28260
2019-09-30	30634
2019-12-31	26156
2020-03-31	26394
2020-06-30	27006
2020-09-30	28894
2020-12-31	27638
2021-03-31	37056
2021-06-30	36087
2021-09-30	37837
2021-12-31	37957
2022-03-31	35891
2022-06-30	33040
2022-09-30	34186
2022-12-31	34231
2023-03-31	36674
2023-06-30	33816
2023-09-30	33809