Quarter	US dollars
2004-12-31	6
2005-03-31	8
2005-06-30	5
2005-09-30	46
2005-12-31	50
2006-03-31	52
2006-06-30	57
2006-09-30	103
2006-12-31	55
2007-03-31	69
2007-06-30	70
2007-09-30	79
2007-12-31	90
2008-03-31	70
2008-06-30	74
2008-09-30	93
2008-12-31	92
2009-03-31	107
2009-06-30	137
2009-09-30	152
2009-12-31	157
2010-03-31	130
2010-06-30	151
2010-09-30	153
2010-12-31	177
2011-03-31	191
2011-06-30	212
2011-09-30	240
2011-12-31	243
2012-03-31	221
2012-06-30	221
2012-09-30	541
2012-12-31	601
2013-03-31	342
2013-06-30	414
2013-09-30	785
2013-12-31	802
2014-03-31	257
2014-06-30	263
2014-09-30	290
2014-12-31	328
2015-03-31	315
2015-06-30	310
2015-09-30	330
2015-12-31	323
2016-03-31	288
2016-06-30	15
2016-09-30	10
2016-12-31	28
2017-03-31	38
2017-06-30	4
2017-09-30	3
2017-12-31	4
2018-03-31	25
2018-06-30	4
2018-09-30	37
2018-12-31	23
2019-03-31	29
2019-06-30	24
2019-09-30	28
2019-12-31	28
2020-03-31	32
2020-06-30	20
2020-09-30	26
2020-12-31	20
2021-03-31	22
2021-06-30	50
2021-09-30	9
2021-12-31	7
2022-03-31	7
2022-06-30	5
2022-09-30	6
2022-12-31	5
2023-03-31	4
2023-06-30	4
2023-09-30	4