Quarter	US dollars
2004-12-31	53728
2005-03-31	55277
2005-06-30	46055
2005-09-30	46259
2005-12-31	43686
2006-03-31	56285
2006-06-30	49932
2006-09-30	56487
2006-12-31	59884
2007-03-31	66700
2007-06-30	63095
2007-09-30	80614
2007-12-31	66679
2008-03-31	82209
2008-06-30	51006
2008-09-30	54612
2008-12-31	26965
2009-03-31	27269
2009-06-30	25711
2009-09-30	18141
2009-12-31	7010
2010-03-31	2277
2010-06-30	2918
2010-09-30	3097
2010-12-31	4733
2011-03-31	5529
2011-06-30	6157
2011-09-30	1728
2011-12-31	-14
2012-03-31	618
2012-06-30	-3696
2012-09-30	4045
2012-12-31	12312
2013-03-31	16392
2013-06-30	19092
2013-09-30	26900
2013-12-31	28483
2014-03-31	26248
2014-06-30	26611
2014-09-30	22350
2014-12-31	23142
2015-03-31	17380
2015-06-30	15284
2015-09-30	16015
2015-12-31	13082
2016-03-31	16065
2016-06-30	18092
2016-09-30	15481
2016-12-31	14102
2017-03-31	15536
2017-06-30	13117
2017-09-30	11877
2017-12-31	12968
2018-03-31	11367
2018-06-30	10403
2018-09-30	11876
2018-12-31	10814
2019-03-31	10326
2019-06-30	5142
2019-09-30	5912
2019-12-31	7848
2020-03-31	7415
2020-06-30	6568
2020-09-30	7477
2020-12-31	9156
2021-03-31	9196
2021-06-30	10931
2021-09-30	11203
2021-12-31	11718
2022-03-31	11784
2022-06-30	10690
2022-09-30	11140
2022-12-31	11400
2023-03-31	12453
2023-06-30	12520
2023-09-30	12346