Quarter	US dollars
2004-12-31	4696
2005-03-31	4021
2005-06-30	4628
2005-09-30	4848
2005-12-31	5079
2006-03-31	5906
2006-06-30	6521
2006-09-30	4504
2006-12-31	5896
2007-03-31	7414
2007-06-30	10309
2007-09-30	7473
2007-12-31	6717
2008-03-31	6970
2008-06-30	6412
2008-09-30	5492
2008-12-31	4303
2009-03-31	4756
2009-06-30	4423
2009-09-30	4545
2009-12-31	4557
2010-03-31	5393
2010-06-30	6820
2010-09-30	7358
2010-12-31	6404
2011-03-31	6327
2011-06-30	6347
2011-09-30	6674
2011-12-31	6328
2012-03-31	3223
2012-06-30	3208
2012-09-30	5605
2012-12-31	5410
2013-03-31	5321
2013-06-30	5014
2013-09-30	5287
2013-12-31	5266
2014-03-31	5602
2014-06-30	6071
2014-09-30	5968
2014-12-31	5836
2015-03-31	5482
2015-06-30	5485
2015-09-30	4983
2015-12-31	4742
2016-03-31	4943
2016-06-30	4351
2016-09-30	5100
2016-12-31	4241
2017-03-31	4380
2017-06-30	5157
2017-09-30	4853
2017-12-31	4760
2018-03-31	4847
2018-06-30	5090
2018-09-30	4564
2018-12-31	4833
2019-03-31	7064
2019-06-30	7040
2019-09-30	6756
2019-12-31	6856
2020-03-31	6747
2020-06-30	7236
2020-09-30	7175
2020-12-31	7422
2021-03-31	7370
2021-06-30	7194
2021-09-30	9056
2021-12-31	7442
2022-03-31	7367
2022-06-30	6788
2022-09-30	6290
2022-12-31	7147
2023-03-31	8894
2023-06-30	7975
2023-09-30	7625