Quarter	US dollars
2004-12-31	10199
2005-03-31	14872
2005-06-30	12402
2005-09-30	11545
2005-12-31	8973
2006-03-31	9139
2006-06-30	13443
2006-09-30	9285
2006-12-31	8705
2007-03-31	11177
2007-06-30	18296
2007-09-30	25590
2007-12-31	42544
2008-03-31	39152
2008-06-30	39762
2008-09-30	37732
2008-12-31	27406
2009-03-31	23900
2009-06-30	26485
2009-09-30	33120
2009-12-31	32322
2010-03-31	34041
2010-06-30	25726
2010-09-30	33588
2010-12-31	23755
2011-03-31	33033
2011-06-30	29757
2011-09-30	29028
2011-12-31	32034
2012-03-31	39029
2012-06-30	42440
2012-09-30	35169
2012-12-31	34924
2013-03-31	24584
2013-06-30	21399
2013-09-30	23187
2013-12-31	17855
2014-03-31	12917
2014-06-30	10099
2014-09-30	11906
2014-12-31	9256
2015-03-31	9330
2015-06-30	8706
2015-09-30	9379
2015-12-31	10175
2016-03-31	14464
2016-06-30	18323
2016-09-30	18660
2016-12-31	16485
2017-03-31	17517
2017-06-30	15262
2017-09-30	19098
2017-12-31	17271
2018-03-31	14641
2018-06-30	15378
2018-09-30	18668
2018-12-31	20526
2019-03-31	17333
2019-06-30	14864
2019-09-30	12640
2019-12-31	14085
2020-03-31	15078
2020-06-30	11671
2020-09-30	11522
2020-12-31	11929
2021-03-31	13422
2021-06-30	18115
2021-09-30	20008
2021-12-31	24928
2022-03-31	35920
2022-06-30	38674
2022-09-30	37586
2022-12-31	41467
2023-03-31	35100
2023-06-30	26515
2023-09-30	25494