Quarter	US dollars
2004-12-31	0
2005-03-31	-2
2005-06-30	0
2005-09-30	0
2005-12-31	-2
2006-03-31	-2
2006-06-30	-2
2006-09-30	-2
2006-12-31	-2
2007-03-31	-2
2007-06-30	2
2007-09-30	0
2007-12-31	-2
2008-03-31	0
2008-06-30	-2
2008-09-30	0
2008-12-31	-1
2009-03-31	-1
2009-06-30	-2
2009-09-30	-2
2009-12-31	-2
2010-03-31	196
2010-06-30	200
2010-09-30	202
2010-12-31	200
2011-03-31	196
2011-06-30	175
2011-09-30	168
2011-12-31	203
2012-03-31	176
2012-06-30	171
2012-09-30	15
2012-12-31	39
2013-03-31	9
2013-06-30	9
2013-09-30	31
2013-12-31	58
2014-03-31	60
2014-06-30	63
2014-09-30	37
2014-12-31	84
2015-03-31	97
2015-06-30	157
2015-09-30	153
2015-12-31	210
2016-03-31	216
2016-06-30	203
2016-09-30	209
2016-12-31	234
2017-03-31	234
2017-06-30	183
2017-09-30	197
2017-12-31	128
2018-03-31	154
2018-06-30	191
2018-09-30	197
2018-12-31	198
2019-03-31	190
2019-06-30	-4
2019-09-30	-2
2019-12-31	-3
2020-03-31	-4
2020-06-30	-4
2020-09-30	-4
2020-12-31	-5
2021-03-31	-3
2021-06-30	-8
2021-09-30	-16
2021-12-31	-16
2022-03-31	-16
2022-06-30	-16
2022-09-30	-16
2022-12-31	-17
2023-03-31	-17
2023-06-30	-17
2023-09-30	-18