Quarter	US dollars
2004-12-31	0
2005-03-31	0
2005-06-30	-2
2005-09-30	-4
2005-12-31	-5
2006-03-31	-7
2006-06-30	2
2006-09-30	2
2006-12-31	0
2007-03-31	-4
2007-06-30	4
2007-09-30	2
2007-12-31	0
2008-03-31	32
2008-06-30	-2
2008-09-30	-2
2008-12-31	-7
2009-03-31	-3
2009-06-30	-25
2009-09-30	-6
2009-12-31	-6
2010-03-31	3
2010-06-30	-1
2010-09-30	-6
2010-12-31	-8
2011-03-31	-8
2011-06-30	-5
2011-09-30	-3
2011-12-31	-3
2012-03-31	-5
2012-06-30	-8
2012-09-30	-3
2012-12-31	-3
2013-03-31	-6
2013-06-30	-8
2013-09-30	-10
2013-12-31	-17
2014-03-31	-7
2014-06-30	3
2014-09-30	-3
2014-12-31	-3
2015-03-31	-4
2015-06-30	-9
2015-09-30	-8
2015-12-31	-67
2016-03-31	-93
2016-06-30	-79
2016-09-30	-109
2016-12-31	-121
2017-03-31	-106
2017-06-30	-112
2017-09-30	-119
2017-12-31	-126
2018-03-31	-486
2018-06-30	-482
2018-09-30	-450
2018-12-31	-446
2019-03-31	-425
2019-06-30	-461
2019-09-30	-463
2019-12-31	-406
2020-03-31	-407
2020-06-30	-409
2020-09-30	-408
2020-12-31	-415
2021-03-31	-401
2021-06-30	-381
2021-09-30	-4
2021-12-31	1
2022-03-31	-1
2022-06-30	0
2022-09-30	-1
2022-12-31	0
2023-03-31	-2
2023-06-30	-1
2023-09-30	0