Quarter	US dollars
1999-09-30	7
1999-12-31	6
2000-03-31	6
2000-06-30	6
2000-09-30	7
2000-12-31	7
2001-03-31	7
2001-06-30	4
2001-09-30	4
2001-12-31	4
2002-03-31	4
2002-06-30	5
2002-09-30	6
2002-12-31	5
2003-03-31	5
2003-06-30	5
2003-09-30	2
2003-12-31	2
2004-03-31	57
2004-06-30	0
2004-09-30	0
2004-12-31	0
2005-03-31	17
2005-06-30	20
2005-09-30	32
2005-12-31	38
2006-03-31	28
2006-06-30	52
2006-09-30	84
2006-12-31	61
2007-03-31	61
2007-06-30	76
2007-09-30	151
2007-12-31	195
2008-03-31	165
2008-06-30	237
2008-09-30	212
2008-12-31	180
2009-03-31	135
2009-06-30	137
2009-09-30	99
2009-12-31	92
2010-03-31	74
2010-06-30	85
2010-09-30	164
2010-12-31	99
2011-03-31	125
2011-06-30	39
2011-09-30	92
2011-12-31	83
2012-03-31	221
2012-06-30	155
2012-09-30	74
2012-12-31	107
2013-03-31	144
2013-06-30	133
2013-09-30	81
2013-12-31	94
2014-03-31	157
2014-06-30	173
2014-09-30	141
2014-12-31	105
2015-03-31	58
2015-06-30	57
2015-09-30	76
2015-12-31	55
2016-03-31	53
2016-06-30	23
2016-09-30	57
2016-12-31	37
2017-03-31	3
2017-06-30	-29
2017-09-30	-40
2017-12-31	-27
2018-03-31	4
2018-06-30	8
2018-09-30	20
2018-12-31	-5
2019-03-31	4
2019-06-30	25
2019-09-30	48
2019-12-31	13
2020-03-31	5
2020-06-30	12
2020-09-30	37
2020-12-31	82
2021-03-31	-4
2021-06-30	-10
2021-09-30	1
2021-12-31	-3
2022-03-31	22
2022-06-30	-4
2022-09-30	-4
2022-12-31	7
2023-03-31	17
2023-06-30	23
2023-09-30	-3