Quarter	US dollars
1999-03-31	71
1999-06-30	44
1999-09-30	10
1999-12-31	28
2000-03-31	55
2000-06-30	23
2000-09-30	122
2000-12-31	141
2001-03-31	128
2001-06-30	173
2001-09-30	130
2001-12-31	0
2002-03-31	18
2002-06-30	0
2002-09-30	0
2002-12-31	0
2003-03-31	0
2003-06-30	0
2003-09-30	0
2003-12-31	0
2004-03-31	0
2004-06-30	0
2004-09-30	0
2004-12-31	0
2005-03-31	0
2005-06-30	37
2005-09-30	140
2005-12-31	152
2006-03-31	219
2006-06-30	206
2006-09-30	202
2006-12-31	170
2007-03-31	185
2007-06-30	251
2007-09-30	240
2007-12-31	118
2008-03-31	42
2008-06-30	37
2008-09-30	28
2008-12-31	0
2009-03-31	0
2009-06-30	1
2009-09-30	1
2009-12-31	1
2010-03-31	1
2010-06-30	1
2010-09-30	9
2010-12-31	0
2011-03-31	8
2011-06-30	150
2011-09-30	73
2011-12-31	61
2012-03-31	73
2012-06-30	152
2012-09-30	52
2012-12-31	11
2013-03-31	1
2013-06-30	1
2013-09-30	4
2013-12-31	85
2014-03-31	89
2014-06-30	67
2014-09-30	70
2014-12-31	70
2015-03-31	7
2015-06-30	5
2015-09-30	4
2015-12-31	4
2016-03-31	19
2016-06-30	2
2016-09-30	1
2016-12-31	3
2017-03-31	5
2017-06-30	5
2017-09-30	26
2017-12-31	120
2018-03-31	82
2018-06-30	80
2018-09-30	70
2018-12-31	0
2019-03-31	65
2019-06-30	58
2019-09-30	0
2019-12-31	0
2020-03-31	6
2020-06-30	42
2020-09-30	75
2020-12-31	2
2021-03-31	49
2021-06-30	51
2021-09-30	17
2021-12-31	19
2022-03-31	11
2022-06-30	10
2022-09-30	9
2022-12-31	14
2023-03-31	12
2023-06-30	5
2023-09-30	6