Quarter	US dollars
2004-12-31	19
2005-03-31	19
2005-06-30	16
2005-09-30	18
2005-12-31	14
2006-03-31	14
2006-06-30	13
2006-09-30	13
2006-12-31	12
2007-03-31	12
2007-06-30	12
2007-09-30	16
2007-12-31	24
2008-03-31	54
2008-06-30	10
2008-09-30	9
2008-12-31	9
2009-03-31	9
2009-06-30	10
2009-09-30	10
2009-12-31	8
2010-03-31	8
2010-06-30	7
2010-09-30	6
2010-12-31	6
2011-03-31	10
2011-06-30	6
2011-09-30	5
2011-12-31	9
2012-03-31	8
2012-06-30	3
2012-09-30	3
2012-12-31	5
2013-03-31	3
2013-06-30	3
2013-09-30	3
2013-12-31	2
2014-03-31	2
2014-06-30	2
2014-09-30	0
2014-12-31	0
2015-03-31	0
2015-06-30	6
2015-09-30	6
2015-12-31	4
2016-03-31	1
2016-06-30	0
2016-09-30	0
2016-12-31	0
2017-03-31	0
2017-06-30	220
2017-09-30	193
2017-12-31	176
2018-03-31	182
2018-06-30	177
2018-09-30	177
2018-12-31	181
2019-03-31	177
2019-06-30	172
2019-09-30	165
2019-12-31	85
2020-03-31	83
2020-06-30	78
2020-09-30	72
2020-12-31	75
2021-03-31	77
2021-06-30	70
2021-09-30	70
2021-12-31	70
2022-03-31	72
2022-06-30	72
2022-09-30	71
2022-12-31	73
2023-03-31	72
2023-06-30	71
2023-09-30	72