Quarter	US dollars
2004-12-31	15
2005-03-31	15
2005-06-30	14
2005-09-30	9
2005-12-31	15
2006-03-31	10
2006-06-30	11
2006-09-30	11
2006-12-31	33
2007-03-31	33
2007-06-30	86
2007-09-30	192
2007-12-31	273
2008-03-31	358
2008-06-30	372
2008-09-30	396
2008-12-31	243
2009-03-31	258
2009-06-30	262
2009-09-30	265
2009-12-31	245
2010-03-31	190
2010-06-30	147
2010-09-30	98
2010-12-31	72
2011-03-31	64
2011-06-30	26
2011-09-30	45
2011-12-31	36
2012-03-31	29
2012-06-30	30
2012-09-30	44
2012-12-31	19
2013-03-31	1670
2013-06-30	1635
2013-09-30	1569
2013-12-31	1395
2014-03-31	1010
2014-06-30	884
2014-09-30	837
2014-12-31	729
2015-03-31	679
2015-06-30	733
2015-09-30	504
2015-12-31	452
2016-03-31	457
2016-06-30	357
2016-09-30	331
2016-12-31	332
2017-03-31	8
2017-06-30	6
2017-09-30	205
2017-12-31	159
2018-03-31	157
2018-06-30	153
2018-09-30	158
2018-12-31	128
2019-03-31	130
2019-06-30	5
2019-09-30	5
2019-12-31	4
2020-03-31	5
2020-06-30	5
2020-09-30	5
2020-12-31	4
2021-03-31	4
2021-06-30	4
2021-09-30	5
2021-12-31	4
2022-03-31	5
2022-06-30	5
2022-09-30	5
2022-12-31	5
2023-03-31	5
2023-06-30	5
2023-09-30	4