Quarter	US dollars
2004-12-31	0
2005-03-31	0
2005-06-30	0
2005-09-30	2
2005-12-31	7
2006-03-31	3
2006-06-30	15
2006-09-30	11
2006-12-31	-6
2007-03-31	29
2007-06-30	10
2007-09-30	14
2007-12-31	10
2008-03-31	16
2008-06-30	12
2008-09-30	5
2008-12-31	14
2009-03-31	11
2009-06-30	12
2009-09-30	14
2009-12-31	24
2010-03-31	23
2010-06-30	22
2010-09-30	20
2010-12-31	22
2011-03-31	18
2011-06-30	14
2011-09-30	-1547
2011-12-31	-1531
2012-03-31	-1576
2012-06-30	-1564
2012-09-30	-1608
2012-12-31	-1612
2013-03-31	-1479
2013-06-30	-1471
2013-09-30	-1619
2013-12-31	-1089
2014-03-31	-1099
2014-06-30	-1127
2014-09-30	-1068
2014-12-31	-1029
2015-03-31	-978
2015-06-30	-1037
2015-09-30	-998
2015-12-31	-977
2016-03-31	-948
2016-06-30	-885
2016-09-30	-856
2016-12-31	-811
2017-03-31	-824
2017-06-30	-869
2017-09-30	-896
2017-12-31	-12
2018-03-31	-13
2018-06-30	-12
2018-09-30	-13
2018-12-31	-13
2019-03-31	-13
2019-06-30	-13
2019-09-30	-12
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	0
2022-09-30	0
2022-12-31	0
2023-03-31	0
2023-06-30	0
2023-09-30	0