Quarter	US dollars
2004-12-31	2945
2005-03-31	3832
2005-06-30	3006
2005-09-30	4358
2005-12-31	3775
2006-03-31	4123
2006-06-30	3183
2006-09-30	3366
2006-12-31	3208
2007-03-31	2656
2007-06-30	3076
2007-09-30	3421
2007-12-31	2747
2008-03-31	4887
2008-06-30	7174
2008-09-30	3641
2008-12-31	2175
2009-03-31	1895
2009-06-30	3236
2009-09-30	2895
2009-12-31	3951
2010-03-31	4791
2010-06-30	3597
2010-09-30	4679
2010-12-31	4484
2011-03-31	4740
2011-06-30	5021
2011-09-30	4772
2011-12-31	4113
2012-03-31	5437
2012-06-30	7372
2012-09-30	7064
2012-12-31	5059
2013-03-31	8090
2013-06-30	4630
2013-09-30	7462
2013-12-31	6586
2014-03-31	7496
2014-06-30	7960
2014-09-30	8857
2014-12-31	6949
2015-03-31	6069
2015-06-30	6589
2015-09-30	5386
2015-12-31	4693
2016-03-31	5479
2016-06-30	5560
2016-09-30	5439
2016-12-31	4641
2017-03-31	6315
2017-06-30	8149
2017-09-30	8107
2017-12-31	7797
2018-03-31	8016
2018-06-30	8404
2018-09-30	9099
2018-12-31	9467
2019-03-31	8789
2019-06-30	8722
2019-09-30	6735
2019-12-31	5684
2020-03-31	11706
2020-06-30	8850
2020-09-30	8335
2020-12-31	6167
2021-03-31	10180
2021-06-30	10009
2021-09-30	8589
2021-12-31	7478
2022-03-31	9578
2022-06-30	10621
2022-09-30	13068
2022-12-31	9182
2023-03-31	10402
2023-06-30	12904
2023-09-30	15010