Quarter	US dollars
1999-03-31	38
1999-06-30	42
1999-09-30	40
1999-12-31	42
2000-03-31	42
2000-06-30	49
2000-09-30	64
2000-12-31	86
2001-03-31	91
2001-06-30	102
2001-09-30	113
2001-12-31	119
2002-03-31	127
2002-06-30	141
2002-09-30	139
2002-12-31	145
2003-03-31	151
2003-06-30	151
2003-09-30	155
2003-12-31	105
2004-03-31	95
2004-06-30	122
2004-09-30	388
2004-12-31	359
2005-03-31	285
2005-06-30	285
2005-09-30	283
2005-12-31	361
2006-03-31	276
2006-06-30	273
2006-09-30	290
2006-12-31	294
2007-03-31	141
2007-06-30	330
2007-09-30	917
2007-12-31	598
2008-03-31	271
2008-06-30	1248
2008-09-30	3048
2008-12-31	2401
2009-03-31	1382
2009-06-30	1414
2009-09-30	695
2009-12-31	3159
2010-03-31	2055
2010-06-30	2574
2010-09-30	2054
2010-12-31	1742
2011-03-31	2985
2011-06-30	5549
2011-09-30	6260
2011-12-31	700
2012-03-31	4775
2012-06-30	4377
2012-09-30	3480
2012-12-31	3287
2013-03-31	3859
2013-06-30	4997
2013-09-30	3754
2013-12-31	2595
2014-03-31	4195
2014-06-30	5887
2014-09-30	3567
2014-12-31	4839
2015-03-31	5415
2015-06-30	5179
2015-09-30	5320
2015-12-31	4252
2016-03-31	4073
2016-06-30	4432
2016-09-30	3980
2016-12-31	4565
2017-03-31	5232
2017-06-30	5462
2017-09-30	5870
2017-12-31	4083
2018-03-31	4944
2018-06-30	5021
2018-09-30	5123
2018-12-31	6300
2019-03-31	5391
2019-06-30	5232
2019-09-30	5596
2019-12-31	5956
2020-03-31	5599
2020-06-30	5684
2020-09-30	5633
2020-12-31	5601
2021-03-31	2908
2021-06-30	2856
2021-09-30	5207
2021-12-31	5738
2022-03-31	5941
2022-06-30	6211
2022-09-30	7150
2022-12-31	7272
2023-03-31	7284
2023-06-30	6787
2023-09-30	6712