Quarter	US dollars
2004-12-31	280
2005-03-31	274
2005-06-30	256
2005-09-30	248
2005-12-31	245
2006-03-31	245
2006-06-30	266
2006-09-30	248
2006-12-31	272
2007-03-31	267
2007-06-30	0
2008-06-30	0
2008-09-30	292
2008-12-31	260
2009-09-30	281
2010-06-30	250
2013-12-31	0
2014-03-31	0
2014-06-30	0
2014-09-30	0
2014-12-31	2
2015-03-31	0
2015-06-30	0
2015-09-30	0
2015-12-31	0
2016-03-31	0
2016-06-30	0
2016-09-30	0
2016-12-31	0
2017-03-31	0
2017-06-30	0
2017-09-30	0
2017-12-31	0
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	0
2019-06-30	0
2019-09-30	0
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