Quarter	US dollars
2004-12-31	31
2005-03-31	21
2005-06-30	16
2005-09-30	11
2005-12-31	2
2006-03-31	3
2006-06-30	7
2006-09-30	2
2006-12-31	4
2007-03-31	6
2007-06-30	8
2007-09-30	14
2007-12-31	14
2008-03-31	42
2008-06-30	18
2008-09-30	16
2008-12-31	24
2009-03-31	16
2009-06-30	15
2009-09-30	21
2009-12-31	15
2010-03-31	18
2010-06-30	25
2010-09-30	24
2010-12-31	23
2011-03-31	61
2011-06-30	29
2011-09-30	19
2011-12-31	15
2012-03-31	22
2012-06-30	22
2012-09-30	23
2012-12-31	16
2013-03-31	32
2013-06-30	18
2013-09-30	26
2013-12-31	25
2014-03-31	23
2014-06-30	41
2014-09-30	49
2014-12-31	62
2015-03-31	67
2015-06-30	63
2015-09-30	76
2015-12-31	70
2016-03-31	91
2016-06-30	144
2016-09-30	100
2016-12-31	98
2017-03-31	68
2017-06-30	52
2017-09-30	42
2017-12-31	26
2018-03-31	18
2018-06-30	38
2018-09-30	7
2018-12-31	11
2019-03-31	18
2019-06-30	27
2019-09-30	37
2019-12-31	29
2020-03-31	64
2020-06-30	64
2020-09-30	59
2020-12-31	55
2021-03-31	34
2021-06-30	37
2021-09-30	36
2021-12-31	31
2022-03-31	12
2022-06-30	10
2022-09-30	6
2022-12-31	2
2023-03-31	0
2023-06-30	1
2023-09-30	0