Quarter	US dollars
1999-09-30	35
1999-12-31	26
2000-03-31	13
2000-06-30	11
2000-09-30	7
2000-12-31	78
2001-03-31	44
2001-06-30	152
2001-09-30	176
2001-12-31	167
2002-03-31	164
2002-06-30	159
2002-09-30	157
2002-12-31	153
2003-03-31	152
2003-06-30	140
2003-09-30	138
2003-12-31	131
2004-03-31	138
2004-06-30	127
2004-09-30	125
2004-12-31	134
2005-03-31	129
2005-06-30	111
2005-09-30	103
2005-12-31	96
2006-03-31	94
2006-06-30	89
2006-09-30	80
2006-12-31	70
2007-03-31	71
2007-06-30	62
2007-09-30	61
2007-12-31	48
2008-03-31	50
2008-06-30	42
2008-09-30	237
2008-12-31	29
2009-03-31	29
2009-06-30	25
2009-09-30	24
2009-12-31	16
2010-03-31	18
2010-06-30	30
2010-09-30	17
2010-12-31	11
2011-03-31	8
2011-06-30	8
2011-09-30	6
2011-12-31	2
2012-03-31	3
2012-06-30	3
2012-09-30	11
2012-12-31	15
2013-03-31	15
2013-06-30	15
2013-09-30	16
2013-12-31	2
2014-03-31	23
2014-06-30	17
2014-09-30	16
2014-12-31	5
2015-03-31	4
2015-06-30	5
2015-09-30	5
2015-12-31	4
2016-03-31	4
2016-06-30	4
2016-09-30	4
2016-12-31	4
2017-03-31	4
2017-06-30	4
2017-09-30	4
2017-12-31	4
2018-03-31	4
2018-06-30	4
2018-09-30	4
2018-12-31	4
2019-03-31	5
2019-06-30	4
2019-09-30	6
2019-12-31	1
2020-03-31	1
2020-06-30	2
2020-09-30	0
2020-12-31	4
2021-03-31	0
2021-06-30	7
2021-09-30	15
2021-12-31	-11
2022-03-31	12
2022-06-30	4
2022-09-30	8
2022-12-31	12
2023-03-31	18
2023-06-30	19
2023-09-30	18