Quarter	US dollars
2004-12-31	51920
2005-03-31	41133
2005-06-30	62508
2005-09-30	63247
2005-12-31	55800
2006-03-31	51057
2006-06-30	66457
2006-09-30	54860
2006-12-31	65105
2007-03-31	68793
2007-06-30	94869
2007-09-30	112018
2007-12-31	138260
2008-03-31	206879
2008-06-30	215456
2008-09-30	210331
2008-12-31	350253
2009-03-31	334003
2009-06-30	219518
2009-09-30	214948
2009-12-31	163781
2010-03-31	151074
2010-06-30	171494
2010-09-30	171093
2010-12-31	150759
2011-03-31	128117
2011-06-30	127579
2011-09-30	185041
2011-12-31	163789
2012-03-31	140212
2012-06-30	139839
2012-09-30	105994
2012-12-31	89787
2013-03-31	73388
2013-06-30	72526
2013-09-30	56230
2013-12-31	44419
2014-03-31	64825
2014-06-30	71708
2014-09-30	87148
2014-12-31	91120
2015-03-31	94523
2015-06-30	68391
2015-09-30	75503
2015-12-31	61614
2016-03-31	69298
2016-06-30	65421
2016-09-30	53737
2016-12-31	51614
2017-03-31	39480
2017-06-30	39849
2017-09-30	36847
2017-12-31	5819
2018-03-31	491
2018-06-30	236
2018-09-30	29527
2018-12-31	28798
2019-03-31	57505
2019-06-30	23229
2019-09-30	29819
2019-12-31	22561
2020-03-31	27767
2020-06-30	26357
2020-09-30	15240
2020-12-31	22386
2021-03-31	21362
2021-06-30	23353
2021-09-30	14903
2021-12-31	16776
2022-03-31	15850
2022-06-30	21251
2022-09-30	25805
2022-12-31	23686
2023-03-31	26236
2023-06-30	23076
2023-09-30	24651