Quarter	US dollars
2004-12-31	19598
2005-03-31	28072
2005-06-30	19857
2005-09-30	23440
2005-12-31	27783
2006-03-31	25436
2006-06-30	27120
2006-09-30	31535
2006-12-31	33782
2007-03-31	40772
2007-06-30	38992
2007-09-30	41433
2007-12-31	34277
2008-03-31	31418
2008-06-30	30319
2008-09-30	26088
2008-12-31	25887
2009-03-31	22750
2009-06-30	21934
2009-09-30	15061
2009-12-31	14129
2010-03-31	16767
2010-06-30	15142
2010-09-30	18772
2010-12-31	16142
2011-03-31	16434
2011-06-30	20436
2011-09-30	16789
2011-12-31	18668
2012-03-31	15470
2012-06-30	16062
2012-09-30	15513
2012-12-31	13331
2013-03-31	11739
2013-06-30	10935
2013-09-30	11917
2013-12-31	12198
2014-03-31	12636
2014-06-30	12773
2014-09-30	9309
2014-12-31	10634
2015-03-31	11443
2015-06-30	10181
2015-09-30	10156
2015-12-31	6966
2016-03-31	7829
2016-06-30	6885
2016-09-30	5447
2016-12-31	4102
2017-03-31	4851
2017-06-30	4930
2017-09-30	4304
2017-12-31	3900
2018-03-31	5578
2018-06-30	4996
2018-09-30	6646
2018-12-31	5804
2019-03-31	5995
2019-06-30	6276
2019-09-30	5747
2019-12-31	4942
2020-03-31	5010
2020-06-30	3892
2020-09-30	7656
2020-12-31	5849
2021-03-31	7697
2021-06-30	5821
2021-09-30	7729
2021-12-31	7028
2022-03-31	6466
2022-06-30	9135
2022-09-30	7295
2022-12-31	8761
2023-03-31	6950
2023-06-30	7513
2023-09-30	8277