Quarter	US dollars
2004-12-31	4207
2005-03-31	7756
2005-06-30	4492
2005-09-30	7240
2005-12-31	4767
2006-03-31	7757
2006-06-30	5800
2006-09-30	10378
2006-12-31	6280
2007-03-31	9648
2007-06-30	7582
2007-09-30	8846
2007-12-31	16992
2008-03-31	23258
2008-06-30	19342
2008-09-30	21932
2008-12-31	13072
2009-03-31	14042
2009-06-30	14360
2009-09-30	16713
2009-12-31	15983
2010-03-31	20114
2010-06-30	19756
2010-09-30	23755
2010-12-31	20607
2011-03-31	22609
2011-06-30	23159
2011-09-30	24817
2011-12-31	22751
2012-03-31	25344
2012-06-30	23063
2012-09-30	22441
2012-12-31	23631
2013-03-31	22181
2013-06-30	18540
2013-09-30	18699
2013-12-31	15945
2014-03-31	15768
2014-06-30	18231
2014-09-30	19508
2014-12-31	18158
2015-03-31	17508
2015-06-30	17604
2015-09-30	15779
2015-12-31	15450
2016-03-31	15248
2016-06-30	15282
2016-09-30	14746
2016-12-31	13650
2017-03-31	18467
2017-06-30	23495
2017-09-30	22799
2017-12-31	22901
2018-03-31	22964
2018-06-30	20050
2018-09-30	21166
2018-12-31	21180
2019-03-31	21764
2019-06-30	24104
2019-09-30	23975
2019-12-31	22551
2020-03-31	23767
2020-06-30	20106
2020-09-30	20788
2020-12-31	22851
2021-03-31	23132
2021-06-30	23975
2021-09-30	24916
2021-12-31	26423
2022-03-31	26086
2022-06-30	25061
2022-09-30	23844
2022-12-31	27087
2023-03-31	27399
2023-06-30	27261
2023-09-30	27037