Quarter	US dollars
1999-09-30	2
1999-12-31	2
2000-03-31	3
2000-06-30	3
2000-09-30	3
2000-12-31	3
2001-03-31	4
2001-06-30	3
2001-09-30	3
2001-12-31	0
2002-03-31	0
2002-06-30	2
2002-09-30	9
2002-12-31	10
2003-03-31	9
2003-06-30	10
2003-09-30	8
2003-12-31	5
2004-03-31	9
2004-06-30	4
2004-09-30	5
2004-12-31	4
2005-03-31	2
2005-06-30	4
2005-09-30	2
2005-12-31	0
2006-03-31	3
2006-06-30	2
2006-09-30	0
2006-12-31	0
2007-03-31	0
2007-06-30	0
2007-09-30	2
2007-12-31	4
2008-03-31	4
2008-06-30	4
2008-09-30	11
2008-12-31	39
2009-03-31	33
2009-06-30	15
2009-09-30	22
2009-12-31	15
2010-03-31	20
2010-06-30	34
2010-09-30	41
2010-12-31	30
2011-03-31	29
2011-06-30	31
2011-09-30	58
2011-12-31	49
2012-03-31	56
2012-06-30	61
2012-09-30	53
2012-12-31	58
2013-03-31	52
2013-06-30	61
2013-09-30	52
2013-12-31	94
2014-03-31	107
2014-06-30	118
2014-09-30	151
2014-12-31	153
2015-03-31	143
2015-06-30	96
2015-09-30	132
2015-12-31	116
2016-03-31	83
2016-06-30	111
2016-09-30	64
2016-12-31	101
2017-03-31	30
2017-06-30	40
2017-09-30	58
2017-12-31	9
2018-03-31	38
2018-06-30	11
2018-09-30	7
2018-12-31	4
2019-03-31	5
2019-06-30	1
2019-09-30	2
2019-12-31	11
2020-03-31	22
2020-06-30	1
2020-09-30	1
2020-12-31	3
2021-03-31	28
2021-06-30	21
2021-09-30	15
2021-12-31	3
2022-03-31	0
2022-06-30	0
2022-09-30	0
2022-12-31	0
2023-03-31	0
2023-06-30	15
2023-09-30	17