Quarter	US dollars
2004-12-31	60
2005-03-31	64
2005-06-30	63
2005-09-30	58
2005-12-31	58
2006-03-31	54
2006-06-30	55
2006-09-30	50
2006-12-31	51
2007-03-31	47
2007-06-30	44
2007-09-30	41
2007-12-31	42
2008-03-31	42
2008-06-30	40
2008-09-30	41
2008-12-31	33
2009-03-31	30
2009-06-30	30
2009-09-30	32
2009-12-31	27
2010-03-31	29
2010-06-30	27
2010-09-30	0
2010-12-31	0
2011-03-31	0
2011-06-30	0
2011-09-30	0
2011-12-31	14
2012-03-31	13
2012-06-30	11
2012-09-30	11
2012-12-31	10
2013-03-31	0
2013-06-30	0
2013-09-30	0
2013-12-31	0
2014-03-31	0
2014-06-30	0
2014-09-30	2
2014-12-31	2
2015-03-31	1
2015-06-30	149
2015-09-30	145
2015-12-31	142
2016-03-31	155
2016-06-30	162
2016-09-30	157
2016-12-31	134
2017-03-31	131
2017-06-30	0
2017-09-30	0
2017-12-31	15
2018-03-31	25
2018-06-30	11
2018-09-30	35
2018-12-31	22
2019-03-31	111
2019-06-30	136
2019-09-30	136
2019-12-31	178
2020-03-31	156
2020-06-30	140
2020-09-30	180
2020-12-31	183
2021-03-31	174
2021-06-30	178
2021-09-30	181
2021-12-31	163
2022-03-31	147
2022-06-30	138
2022-09-30	142
2022-12-31	136
2023-03-31	138
2023-06-30	137
2023-09-30	134