Quarter	US dollars
1999-09-30	5
1999-12-31	8
2000-03-31	11
2000-06-30	6
2000-09-30	15
2000-12-31	9
2001-03-31	17
2001-06-30	8
2001-09-30	15
2001-12-31	16
2002-03-31	6
2002-06-30	15
2002-09-30	16
2002-12-31	26
2003-03-31	17
2003-06-30	17
2003-09-30	20
2003-12-31	394
2004-03-31	22
2004-06-30	13
2004-09-30	24
2004-12-31	31
2005-03-31	34
2005-06-30	47
2005-09-30	42
2005-12-31	51
2006-03-31	50
2006-06-30	89
2006-09-30	133
2006-12-31	102
2007-03-31	104
2007-06-30	235
2007-09-30	287
2007-12-31	362
2008-03-31	431
2008-06-30	378
2008-09-30	928
2008-12-31	671
2009-03-31	562
2009-06-30	743
2009-09-30	788
2009-12-31	451
2010-03-31	466
2010-06-30	551
2010-09-30	581
2010-12-31	493
2011-03-31	383
2011-06-30	337
2011-09-30	351
2011-12-31	399
2012-03-31	267
2012-06-30	229
2012-09-30	215
2012-12-31	239
2013-03-31	209
2013-06-30	176
2013-09-30	131
2013-12-31	155
2014-03-31	303
2014-06-30	246
2014-09-30	488
2014-12-31	1047
2015-03-31	561
2015-06-30	481
2015-09-30	460
2015-12-31	416
2016-03-31	282
2016-06-30	265
2016-09-30	253
2016-12-31	30
2017-03-31	30
2017-06-30	34
2017-09-30	27
2017-12-31	27
2018-03-31	29
2018-06-30	30
2018-09-30	38
2018-12-31	102
2019-03-31	52
2019-06-30	64
2019-09-30	101
2019-12-31	99
2020-03-31	122
2020-06-30	87
2020-09-30	78
2020-12-31	70
2021-03-31	58
2021-06-30	59
2021-09-30	139
2021-12-31	137
2022-03-31	107
2022-06-30	97
2022-09-30	16
2022-12-31	16
2023-03-31	15
2023-06-30	11
2023-09-30	8