Quarter	US dollars
2004-12-31	4671
2005-03-31	5673
2005-06-30	4453
2005-09-30	4758
2005-12-31	4600
2006-03-31	4687
2006-06-30	4697
2006-09-30	5599
2006-12-31	5004
2007-03-31	5778
2007-06-30	5433
2007-09-30	8015
2007-12-31	6379
2008-03-31	7010
2008-06-30	7138
2008-09-30	5571
2008-12-31	12468
2009-03-31	12206
2009-06-30	11282
2009-09-30	11969
2009-12-31	9929
2010-03-31	9079
2010-06-30	9007
2010-09-30	10004
2010-12-31	8026
2011-03-31	8805
2011-06-30	7137
2011-09-30	5599
2011-12-31	4409
2012-03-31	4206
2012-06-30	4433
2012-09-30	5310
2012-12-31	4863
2013-03-31	4910
2013-06-30	5531
2013-09-30	5647
2013-12-31	5185
2014-03-31	4613
2014-06-30	4736
2014-09-30	3842
2014-12-31	3857
2015-03-31	4372
2015-06-30	3810
2015-09-30	3653
2015-12-31	5390
2016-03-31	4073
2016-06-30	3999
2016-09-30	3158
2016-12-31	4032
2017-03-31	3151
2017-06-30	3416
2017-09-30	3667
2017-12-31	3534
2018-03-31	3505
2018-06-30	3950
2018-09-30	2722
2018-12-31	3284
2019-03-31	2405
2019-06-30	2301
2019-09-30	2986
2019-12-31	3077
2020-03-31	3911
2020-06-30	2504
2020-09-30	2542
2020-12-31	3026
2021-03-31	2569
2021-06-30	2894
2021-09-30	2511
2021-12-31	2755
2022-03-31	2942
2022-06-30	3069
2022-09-30	3178
2022-12-31	3304
2023-03-31	3226
2023-06-30	3918
2023-09-30	4042