Quarter	US dollars
2004-12-31	6
2005-03-31	8
2005-06-30	29
2005-09-30	9
2005-12-31	10
2006-03-31	9
2006-06-30	11
2006-09-30	6
2006-12-31	16
2007-03-31	14
2007-06-30	14
2007-09-30	14
2007-12-31	14
2008-03-31	14
2008-06-30	14
2008-09-30	12
2008-12-31	10
2009-03-31	10
2009-06-30	12
2009-09-30	11
2009-12-31	11
2010-03-31	11
2010-06-30	10
2010-09-30	11
2010-12-31	11
2011-03-31	3
2011-06-30	11
2011-09-30	11
2011-12-31	-2
2012-03-31	-2
2012-06-30	-2
2012-09-30	-2
2012-12-31	-2
2013-03-31	3
2013-06-30	-3
2013-09-30	0
2013-12-31	-2
2014-03-31	-2
2014-06-30	-3
2014-09-30	-5
2014-12-31	-2
2015-03-31	-1
2015-06-30	-2
2015-09-30	-2
2015-12-31	0
2016-03-31	0
2016-06-30	0
2016-09-30	-1
2016-12-31	1
2017-03-31	1
2017-06-30	3
2017-09-30	0
2017-12-31	-1
2018-03-31	-1
2018-06-30	-3
2018-09-30	-1
2018-12-31	-1
2019-03-31	0
2019-06-30	0
2019-09-30	0
2019-12-31	0
2020-03-31	0
2020-06-30	0
2020-09-30	0
2020-12-31	0
2021-03-31	0
2021-06-30	0
2021-09-30	0
2021-12-31	0
2022-03-31	0
2022-06-30	-1
2022-09-30	10
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	-1