Quarter	US dollars
2004-12-31	13
2005-03-31	4
2005-06-30	2
2005-09-30	4
2005-12-31	3
2006-03-31	3
2006-06-30	4
2006-09-30	0
2006-12-31	2
2007-03-31	4
2007-06-30	-6
2007-09-30	-6
2007-12-31	-22
2008-03-31	6
2008-06-30	4
2008-09-30	-4
2008-12-31	-6
2009-03-31	-6
2009-06-30	-8
2009-09-30	-13
2009-12-31	-15
2010-03-31	-14
2010-06-30	-15
2010-09-30	-19
2010-12-31	-20
2011-03-31	-32
2011-06-30	-27
2011-09-30	-14
2011-12-31	-12
2012-03-31	-40
2012-06-30	-33
2012-09-30	-16
2012-12-31	-26
2013-03-31	-26
2013-06-30	-65
2013-09-30	-73
2013-12-31	-48
2014-03-31	-17
2014-06-30	17
2014-09-30	-13
2014-12-31	20
2015-03-31	-9
2015-06-30	-22
2015-09-30	39
2015-12-31	36
2016-03-31	42
2016-06-30	20
2016-09-30	-1
2016-12-31	-9
2017-03-31	-6
2017-06-30	-5
2017-09-30	-11
2017-12-31	16
2018-03-31	13
2018-06-30	11
2018-09-30	-89
2018-12-31	-102
2019-03-31	-172
2019-06-30	-150
2019-09-30	-171
2019-12-31	-172
2020-03-31	-145
2020-06-30	-52
2020-09-30	-54
2020-12-31	-55
2021-03-31	-61
2021-06-30	-83
2021-09-30	-84
2021-12-31	-84
2022-03-31	-58
2022-06-30	-58
2022-09-30	-60
2022-12-31	-37
2023-03-31	-38
2023-06-30	-43
2023-09-30	-44