Quarter	US dollars
1999-03-31	146
1999-06-30	131
1999-09-30	91
1999-12-31	48
2000-03-31	66
2000-06-30	233
2000-09-30	111
2000-12-31	86
2001-03-31	130
2001-06-30	212
2001-09-30	162
2001-12-31	67
2002-03-31	173
2002-06-30	92
2002-09-30	36
2002-12-31	293
2003-03-31	463
2003-06-30	75
2003-09-30	113
2003-12-31	249
2004-03-31	240
2004-06-30	163
2004-09-30	222
2004-12-31	329
2005-03-31	591
2005-06-30	136
2005-09-30	122
2005-12-31	326
2006-03-31	82
2006-06-30	214
2006-09-30	395
2006-12-31	402
2007-03-31	286
2007-06-30	389
2007-09-30	938
2007-12-31	431
2008-03-31	701
2008-06-30	480
2008-09-30	299
2008-12-31	227
2009-03-31	229
2009-06-30	687
2009-09-30	188
2009-12-31	327
2010-03-31	111
2010-06-30	93
2010-09-30	85
2010-12-31	120
2011-03-31	85
2011-06-30	424
2011-09-30	8
2011-12-31	69
2012-03-31	19
2012-06-30	19
2012-09-30	12
2012-12-31	54
2013-03-31	41
2013-06-30	8
2013-09-30	9
2013-12-31	40
2014-03-31	40
2014-06-30	38
2014-09-30	63
2014-12-31	51
2015-03-31	58
2015-06-30	72
2015-09-30	70
2015-12-31	45
2016-03-31	61
2016-06-30	64
2016-09-30	28
2016-12-31	56
2017-03-31	35
2017-06-30	30
2017-09-30	27
2017-12-31	27
2018-03-31	43
2018-06-30	27
2018-09-30	37
2018-12-31	6
2019-03-31	27
2019-06-30	16
2019-09-30	10
2019-12-31	30
2020-03-31	26
2020-06-30	28
2020-09-30	40
2020-12-31	32
2021-03-31	40
2021-06-30	33
2021-09-30	37
2021-12-31	24
2022-03-31	20
2022-06-30	16
2022-09-30	18
2022-12-31	9
2023-03-31	17
2023-06-30	15
2023-09-30	14