Quarter	US dollars
2004-12-31	16653
2005-03-31	18082
2005-06-30	15322
2005-09-30	17449
2005-12-31	19054
2006-03-31	23143
2006-06-30	25969
2006-09-30	24933
2006-12-31	28537
2007-03-31	34697
2007-06-30	41890
2007-09-30	35581
2007-12-31	33141
2008-03-31	34455
2008-06-30	40023
2008-09-30	33249
2008-12-31	28546
2009-03-31	27409
2009-06-30	24834
2009-09-30	26139
2009-12-31	22987
2010-03-31	18032
2010-06-30	16680
2010-09-30	17483
2010-12-31	16909
2011-03-31	14837
2011-06-30	11570
2011-09-30	10120
2011-12-31	8655
2012-03-31	9159
2012-06-30	8656
2012-09-30	10356
2012-12-31	16446
2013-03-31	14814
2013-06-30	16937
2013-09-30	16142
2013-12-31	15551
2014-03-31	13694
2014-06-30	14038
2014-09-30	6595
2014-12-31	7987
2015-03-31	8337
2015-06-30	6812
2015-09-30	7507
2015-12-31	3156
2016-03-31	3645
2016-06-30	3406
2016-09-30	4601
2016-12-31	6578
2017-03-31	4854
2017-06-30	6967
2017-09-30	6935
2017-12-31	8179
2018-03-31	5828
2018-06-30	4806
2018-09-30	7109
2018-12-31	4335
2019-03-31	9954
2019-06-30	8362
2019-09-30	8773
2019-12-31	8741
2020-03-31	7834
2020-06-30	7845
2020-09-30	6463
2020-12-31	7596
2021-03-31	4417
2021-06-30	5345
2021-09-30	6673
2021-12-31	4685
2022-03-31	2780
2022-06-30	1889
2022-09-30	935
2022-12-31	1956
2023-03-31	3948
2023-06-30	4587
2023-09-30	4601