Quarter	US dollars
2004-12-31	2
2005-03-31	17
2005-06-30	2
2005-09-30	7
2005-12-31	3
2006-03-31	2
2006-06-30	2
2006-09-30	19
2006-12-31	18
2007-03-31	18
2007-06-30	36
2007-09-30	49
2007-12-31	111
2008-03-31	93
2008-06-30	56
2008-09-30	86
2008-12-31	52
2009-03-31	40
2009-06-30	41
2009-09-30	42
2009-12-31	63
2010-03-31	0
2010-06-30	0
2010-09-30	0
2010-12-31	0
2011-03-31	0
2011-06-30	0
2011-09-30	0
2011-12-31	15
2012-03-31	14
2012-06-30	35
2012-09-30	34
2012-12-31	60
2013-03-31	53
2013-06-30	49
2013-09-30	40
2013-12-31	50
2014-03-31	37
2014-06-30	39
2014-09-30	11
2014-12-31	11
2015-03-31	6
2015-06-30	25
2015-09-30	5
2015-12-31	311
2016-03-31	303
2016-06-30	312
2016-09-30	310
2016-12-31	330
2017-03-31	319
2017-06-30	151
2017-09-30	150
2017-12-31	150
2018-03-31	150
2018-06-30	151
2018-09-30	150
2018-12-31	149
2019-03-31	150
2019-06-30	150
2019-09-30	150
2019-12-31	75
2020-03-31	74
2020-06-30	83
2020-09-30	71
2020-12-31	79
2021-03-31	79
2021-06-30	75
2021-09-30	74
2021-12-31	70
2022-03-31	71
2022-06-30	70
2022-09-30	71
2022-12-31	71
2023-03-31	70
2023-06-30	71
2023-09-30	71