Quarter	US dollars
2004-12-31	-73
2005-03-31	-91
2005-06-30	-97
2005-09-30	-69
2005-12-31	-89
2006-03-31	-87
2006-06-30	-81
2006-09-30	-92
2006-12-31	-110
2007-03-31	-106
2007-06-30	-102
2007-09-30	-102
2007-12-31	-137
2008-03-31	-151
2008-06-30	-86
2008-09-30	-62
2008-12-31	-66
2009-03-31	-47
2009-06-30	-46
2009-09-30	-37
2009-12-31	-31
2010-03-31	-27
2010-06-30	-73
2010-09-30	-82
2010-12-31	-31
2011-03-31	-48
2011-06-30	-37
2011-09-30	-45
2011-12-31	-43
2012-03-31	-10
2012-06-30	-17
2012-09-30	-68
2012-12-31	-76
2013-03-31	-68
2013-06-30	-44
2013-09-30	-36
2013-12-31	-36
2014-03-31	-33
2014-06-30	-27
2014-09-30	-26
2014-12-31	-27
2015-03-31	-24
2015-06-30	-22
2015-09-30	-20
2015-12-31	0
2016-03-31	46
2016-06-30	-3
2016-09-30	-5
2016-12-31	28
2017-03-31	20
2017-06-30	14
2017-09-30	36
2017-12-31	-7
2018-03-31	28
2018-06-30	7
2018-09-30	25
2018-12-31	-1
2019-03-31	-1
2019-06-30	-1
2019-09-30	-1
2019-12-31	-1
2020-03-31	0
2020-06-30	-1
2020-09-30	0
2020-12-31	0
2021-03-31	-1
2021-06-30	-1
2021-09-30	-1
2021-12-31	-1
2022-03-31	-1
2022-06-30	-1
2022-09-30	-1
2022-12-31	-1
2023-03-31	-1
2023-06-30	-1
2023-09-30	-1