Quarter	US dollars
2004-12-31	0
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	0
2006-12-31	0
2007-03-31	0
2007-06-30	-74
2007-09-30	0
2007-12-31	0
2008-03-31	0
2008-06-30	0
2008-09-30	0
2008-12-31	0
2009-03-31	0
2009-06-30	0
2009-09-30	0
2009-12-31	0
2010-03-31	0
2010-06-30	723
2010-09-30	0
2010-12-31	0
2011-03-31	0
2011-06-30	0
2011-09-30	0
2011-12-31	0
2012-03-31	1787
2012-06-30	1973
2012-09-30	1841
2012-12-31	2015
2013-03-31	1951
2013-06-30	1699
2013-09-30	1410
2013-12-31	1499
2014-03-31	1722
2014-06-30	1718
2014-09-30	1363
2014-12-31	1472
2015-03-31	1727
2015-06-30	1219
2015-09-30	1194
2015-12-31	1181
2016-03-31	1357
2016-06-30	1205
2016-09-30	1083
2016-12-31	1038
2017-03-31	1037
2017-06-30	914
2017-09-30	808
2017-12-31	851
2018-03-31	834
2018-06-30	767
2018-09-30	599
2018-12-31	683
2019-03-31	876
2019-06-30	0
2019-09-30	0
2019-12-31	1
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