Quarter	US dollars
2004-12-31	2252
2005-03-31	2327
2005-06-30	2275
2005-09-30	2101
2005-12-31	2034
2006-03-31	1924
2006-06-30	1866
2006-09-30	2014
2006-12-31	2135
2007-03-31	2150
2007-06-30	2398
2007-09-30	2532
2007-12-31	2755
2008-03-31	3856
2008-06-30	3992
2008-09-30	3910
2008-12-31	3217
2009-03-31	3094
2009-06-30	3471
2009-09-30	3163
2009-12-31	3372
2010-03-31	4324
2010-06-30	3691
2010-09-30	4489
2010-12-31	3662
2011-03-31	4894
2011-06-30	4762
2011-09-30	5030
2011-12-31	4512
2012-03-31	5902
2012-06-30	5837
2012-09-30	5541
2012-12-31	7017
2013-03-31	6930
2013-06-30	6848
2013-09-30	7368
2013-12-31	7419
2014-03-31	7153
2014-06-30	7511
2014-09-30	7234
2014-12-31	7426
2015-03-31	7588
2015-06-30	6943
2015-09-30	6062
2015-12-31	5434
2016-03-31	3875
2016-06-30	5147
2016-09-30	5024
2016-12-31	4712
2017-03-31	4593
2017-06-30	6592
2017-09-30	6650
2017-12-31	6036
2018-03-31	6312
2018-06-30	6048
2018-09-30	5858
2018-12-31	5786
2019-03-31	6658
2019-06-30	6801
2019-09-30	6409
2019-12-31	6349
2020-03-31	5844
2020-06-30	5602
2020-09-30	5612
2020-12-31	6605
2021-03-31	5001
2021-06-30	5467
2021-09-30	6335
2021-12-31	6726
2022-03-31	5839
2022-06-30	6570
2022-09-30	6866
2022-12-31	6351
2023-03-31	6173
2023-06-30	5904
2023-09-30	6014