Quarter	US dollars
1999-03-31	101
1999-06-30	67
1999-09-30	142
1999-12-31	233
2000-03-31	173
2000-06-30	247
2000-09-30	122
2000-12-31	122
2001-03-31	156
2001-06-30	203
2001-09-30	426
2001-12-31	316
2002-03-31	372
2002-06-30	342
2002-09-30	928
2002-12-31	293
2003-03-31	573
2003-06-30	568
2003-09-30	356
2003-12-31	387
2004-03-31	843
2004-06-30	1442
2004-09-30	651
2004-12-31	910
2005-03-31	1782
2005-06-30	1261
2005-09-30	1239
2005-12-31	1353
2006-03-31	1821
2006-06-30	1522
2006-09-30	1672
2006-12-31	1432
2007-03-31	3096
2007-06-30	1613
2007-09-30	1693
2007-12-31	3186
2008-03-31	2697
2008-06-30	3570
2008-09-30	3569
2008-12-31	3163
2009-03-31	3989
2009-06-30	3166
2009-09-30	2572
2009-12-31	2572
2010-03-31	2590
2010-06-30	3161
2010-09-30	4551
2010-12-31	4899
2011-03-31	4195
2011-06-30	4734
2011-09-30	6666
2011-12-31	6809
2012-03-31	7756
2012-06-30	5538
2012-09-30	6405
2012-12-31	6076
2013-03-31	10056
2013-06-30	8061
2013-09-30	8492
2013-12-31	9094
2014-03-31	8673
2014-06-30	9024
2014-09-30	8198
2014-12-31	6411
2015-03-31	6157
2015-06-30	5578
2015-09-30	8166
2015-12-31	4920
2016-03-31	5914
2016-06-30	5412
2016-09-30	7302
2016-12-31	7600
2017-03-31	8675
2017-06-30	11201
2017-09-30	12106
2017-12-31	10568
2018-03-31	10795
2018-06-30	7901
2018-09-30	7930
2018-12-31	9611
2019-03-31	9232
2019-06-30	8810
2019-09-30	8716
2019-12-31	8506
2020-03-31	7688
2020-06-30	6878
2020-09-30	6188
2020-12-31	5530
2021-03-31	5814
2021-06-30	6020
2021-09-30	8814
2021-12-31	4633
2022-03-31	4502
2022-06-30	5053
2022-09-30	6215
2022-12-31	5415
2023-03-31	5176
2023-06-30	4874
2023-09-30	7702