Quarter	US dollars
2004-12-31	4
2005-03-31	2
2005-06-30	4
2005-09-30	4
2005-12-31	3
2006-03-31	3
2006-06-30	20
2006-09-30	4
2006-12-31	2
2007-03-31	6
2007-06-30	6
2007-09-30	4
2007-12-31	6
2008-03-31	10
2008-06-30	8
2008-09-30	7
2008-12-31	13
2009-03-31	11
2009-06-30	13
2009-09-30	16
2009-12-31	16
2010-03-31	52
2010-06-30	15
2010-09-30	19
2010-12-31	25
2011-03-31	24
2011-06-30	24
2011-09-30	23
2011-12-31	19
2012-03-31	18
2012-06-30	42
2012-09-30	87
2012-12-31	102
2013-03-31	99
2013-06-30	42
2013-09-30	78
2013-12-31	91
2014-03-31	98
2014-06-30	125
2014-09-30	117
2014-12-31	101
2015-03-31	56
2015-06-30	88
2015-09-30	80
2015-12-31	73
2016-03-31	73
2016-06-30	63
2016-09-30	48
2016-12-31	49
2017-03-31	46
2017-06-30	64
2017-09-30	40
2017-12-31	5
2018-03-31	4
2018-06-30	4
2018-09-30	10
2018-12-31	10
2019-03-31	35
2019-06-30	34
2019-09-30	159
2019-12-31	30
2020-03-31	48
2020-06-30	67
2020-09-30	40
2020-12-31	42
2021-03-31	172
2021-06-30	41
2021-09-30	44
2021-12-31	121
2022-03-31	42
2022-06-30	67
2022-09-30	67
2022-12-31	73
2023-03-31	45
2023-06-30	34
2023-09-30	24