Quarter	US dollars
1999-03-31	128
1999-06-30	56
1999-09-30	54
1999-12-31	60
2000-03-31	63
2000-06-30	65
2000-09-30	67
2000-12-31	202
2001-03-31	62
2001-06-30	168
2001-09-30	115
2001-12-31	74
2002-03-31	50
2002-06-30	50
2002-09-30	73
2002-12-31	23
2003-03-31	127
2003-06-30	67
2003-09-30	86
2003-12-31	92
2004-03-31	95
2004-06-30	119
2004-09-30	118
2004-12-31	100
2005-03-31	130
2005-06-30	136
2005-09-30	137
2005-12-31	42
2006-03-31	59
2006-06-30	60
2006-09-30	78
2006-12-31	75
2007-03-31	70
2007-06-30	79
2007-09-30	100
2007-12-31	108
2008-03-31	141
2008-06-30	17
2008-09-30	195
2008-12-31	166
2009-03-31	169
2009-06-30	337
2009-09-30	161
2009-12-31	246
2010-03-31	205
2010-06-30	190
2010-09-30	186
2010-12-31	136
2011-03-31	136
2011-06-30	115
2011-09-30	108
2011-12-31	81
2012-03-31	34
2012-06-30	15
2012-09-30	1
2012-12-31	2
2013-03-31	164
2013-06-30	1
2013-09-30	4
2013-12-31	1
2014-03-31	84
2014-06-30	87
2014-09-30	79
2014-12-31	70
2015-03-31	63
2015-06-30	105
2015-09-30	131
2015-12-31	113
2016-03-31	236
2016-06-30	190
2016-09-30	309
2016-12-31	161
2017-03-31	124
2017-06-30	152
2017-09-30	84
2017-12-31	12
2018-03-31	8
2018-06-30	8
2018-09-30	6
2018-12-31	3
2019-03-31	12
2019-06-30	2
2019-09-30	5
2019-12-31	4
2020-03-31	5
2020-06-30	19
2020-09-30	18
2020-12-31	3
2021-03-31	2
2021-06-30	40
2021-09-30	4
2021-12-31	5
2022-03-31	1
2022-06-30	1
2022-09-30	5
2022-12-31	40
2023-03-31	1
2023-06-30	1
2023-09-30	1