Quarter	US dollars
1999-03-31	18
1999-06-30	3
1999-09-30	3
1999-12-31	3
2000-03-31	3
2000-06-30	29
2000-09-30	27
2000-12-31	2
2001-03-31	18
2001-06-30	43
2001-09-30	2
2001-12-31	2
2002-03-31	2
2002-06-30	4
2002-09-30	3
2002-12-31	4
2003-03-31	3
2003-06-30	2
2003-09-30	2
2003-12-31	3
2004-03-31	4
2004-06-30	4
2004-09-30	6
2004-12-31	12
2005-03-31	12
2005-06-30	16
2005-09-30	22
2005-12-31	8
2006-03-31	8
2006-06-30	12
2006-09-30	8
2006-12-31	13
2007-03-31	6
2007-06-30	7
2007-09-30	4
2007-12-31	11
2008-03-31	5
2008-06-30	15
2008-09-30	13
2008-12-31	11
2009-03-31	11
2009-06-30	12
2009-09-30	11
2009-12-31	126
2010-03-31	120
2010-06-30	118
2010-09-30	123
2010-12-31	120
2011-03-31	125
2011-06-30	123
2011-09-30	118
2011-12-31	114
2012-03-31	116
2012-06-30	113
2012-09-30	117
2012-12-31	116
2013-03-31	109
2013-06-30	119
2013-09-30	126
2013-12-31	123
2014-03-31	124
2014-06-30	126
2014-09-30	104
2014-12-31	96
2015-03-31	89
2015-06-30	94
2015-09-30	89
2015-12-31	80
2016-03-31	78
2016-06-30	72
2016-09-30	69
2016-12-31	63
2017-03-31	62
2017-06-30	61
2017-09-30	3
2017-12-31	3
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	0
2019-06-30	0
2019-09-30	0
2019-12-31	3
2020-03-31	0
2020-06-30	0
2020-09-30	0
2020-12-31	1
2021-03-31	1
2021-06-30	1
2021-09-30	0
2021-12-31	0
2022-03-31	0
2022-06-30	0
2022-09-30	0
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	0