Quarter	US dollars
2004-12-31	4
2005-03-31	4
2005-06-30	5
2005-09-30	2
2005-12-31	3
2006-03-31	9
2006-06-30	7
2006-09-30	28
2006-12-31	8
2007-03-31	6
2007-06-30	10
2007-09-30	22
2007-12-31	38
2008-03-31	12
2008-06-30	6
2008-09-30	4
2008-12-31	14
2009-06-30	15
2009-09-30	5
2009-12-31	5
2010-09-30	87
2011-06-30	80
2011-09-30	75
2011-12-31	62
2012-03-31	59
2012-06-30	56
2012-09-30	58
2012-12-31	55
2013-03-31	53
2013-06-30	53
2013-09-30	57
2013-12-31	56
2014-03-31	53
2014-06-30	55
2015-03-31	43
2015-06-30	44
2015-09-30	42
2015-12-31	41
2016-03-31	45
2016-06-30	43
2016-09-30	43
2016-12-31	41
2017-03-31	41
2017-06-30	43
2017-09-30	44
2017-12-31	45
2018-03-31	45
2018-06-30	44
2018-09-30	43
2018-12-31	42
2019-03-31	42
2019-06-30	42
2019-09-30	42
2019-12-31	42
2020-03-31	40
2020-06-30	42
2020-09-30	43
2020-12-31	45
2021-03-31	44
2021-06-30	44
2021-09-30	43
2021-12-31	43
2022-03-31	42
2022-06-30	40
2022-09-30	38
2022-12-31	40
2023-03-31	41
2023-06-30	41
2023-09-30	40