Quarter	US dollars
2004-12-31	50
2005-03-31	59
2005-06-30	52
2005-09-30	44
2005-12-31	41
2006-03-31	26
2006-06-30	39
2006-09-30	32
2006-12-31	33
2007-03-31	35
2007-06-30	32
2007-09-30	26
2007-12-31	18
2008-03-31	20
2008-06-30	28
2008-09-30	12
2008-12-31	12
2009-03-31	11
2009-06-30	13
2009-09-30	11
2009-12-31	11
2010-03-31	9
2010-06-30	9
2010-09-30	11
2010-12-31	11
2011-03-31	11
2011-06-30	11
2011-09-30	14
2011-12-31	17
2012-03-31	19
2012-06-30	19
2012-09-30	16
2012-12-31	19
2013-03-31	18
2013-06-30	20
2013-09-30	19
2013-12-31	17
2014-03-31	10
2014-06-30	15
2014-09-30	15
2014-12-31	2
2015-03-31	3
2015-06-30	0
2015-09-30	3
2015-12-31	3
2016-03-31	3
2016-06-30	3
2016-09-30	8
2016-12-31	4
2017-03-31	3
2017-06-30	4
2017-09-30	3
2017-12-31	77
2018-03-31	77
2018-06-30	86
2018-09-30	51
2018-12-31	59
2019-03-31	66
2019-06-30	89
2019-09-30	80
2019-12-31	78
2020-03-31	71
2020-06-30	20
2020-09-30	1
2020-12-31	3
2021-03-31	1
2021-06-30	1
2021-09-30	1
2021-12-31	1
2022-03-31	3
2022-06-30	1
2022-09-30	2
2022-12-31	1
2023-03-31	4
2023-06-30	5
2023-09-30	6