Quarter	US dollars
1999-09-30	855
1999-12-31	667
2000-03-31	716
2000-06-30	636
2000-09-30	684
2000-12-31	725
2001-03-31	694
2001-06-30	751
2001-09-30	542
2001-12-31	610
2002-03-31	578
2002-06-30	584
2002-09-30	521
2002-12-31	583
2003-03-31	713
2003-06-30	757
2003-09-30	1042
2003-12-31	1137
2004-03-31	1290
2004-06-30	1348
2004-09-30	1442
2004-12-31	1684
2005-03-31	1930
2005-06-30	1873
2005-09-30	2395
2005-12-31	2930
2006-03-31	5276
2006-06-30	5238
2006-09-30	6036
2006-12-31	6926
2007-03-31	9149
2007-06-30	10568
2007-09-30	11016
2007-12-31	11416
2008-03-31	12708
2008-06-30	12806
2008-09-30	12295
2008-12-31	8242
2009-03-31	8156
2009-06-30	10278
2009-09-30	10898
2009-12-31	8313
2010-03-31	9247
2010-06-30	11334
2010-09-30	13426
2010-12-31	12944
2011-03-31	13307
2011-06-30	12434
2011-09-30	11098
2011-12-31	13906
2012-03-31	16347
2012-06-30	13297
2012-09-30	20430
2012-12-31	17916
2013-03-31	24186
2013-06-30	18792
2013-09-30	19514
2013-12-31	17806
2014-03-31	16783
2014-06-30	14717
2014-09-30	15419
2014-12-31	10699
2015-03-31	9309
2015-06-30	8450
2015-09-30	8320
2015-12-31	6354
2016-03-31	6239
2016-06-30	5651
2016-09-30	5415
2016-12-31	4949
2017-03-31	4820
2017-06-30	5265
2017-09-30	6817
2017-12-31	4776
2018-03-31	5557
2018-06-30	3755
2018-09-30	3295
2018-12-31	3869
2019-03-31	3777
2019-06-30	3913
2019-09-30	3166
2019-12-31	3207
2020-03-31	2492
2020-06-30	2571
2020-09-30	2516
2020-12-31	4145
2021-03-31	3203
2021-06-30	2450
2021-09-30	3042
2021-12-31	1585
2022-03-31	836
2022-06-30	538
2022-09-30	488
2022-12-31	356
2023-03-31	367
2023-06-30	341
2023-09-30	284