Quarter	US dollars
2004-12-31	0
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	13
2006-09-30	0
2006-12-31	49
2007-03-31	45
2007-06-30	48
2007-09-30	4
2007-12-31	6
2008-03-31	2
2008-06-30	6
2008-09-30	5
2008-12-31	10
2009-03-31	10
2009-06-30	21
2009-09-30	0
2009-12-31	8
2010-03-31	6
2010-06-30	3
2010-09-30	3
2010-12-31	30
2011-03-31	32
2011-06-30	26
2011-09-30	50
2011-12-31	82
2012-03-31	59
2012-06-30	63
2012-09-30	47
2012-12-31	34
2013-03-31	56
2013-06-30	55
2013-09-30	102
2013-12-31	93
2014-03-31	68
2014-06-30	80
2014-09-30	76
2014-12-31	28
2015-03-31	64
2015-06-30	113
2015-09-30	115
2015-12-31	74
2016-03-31	72
2016-06-30	0
2016-09-30	1
2016-12-31	1
2017-03-31	10
2017-06-30	0
2017-09-30	0
2017-12-31	166
2018-03-31	0
2018-06-30	3
2018-09-30	0
2018-12-31	3
2019-03-31	502
2019-06-30	509
2019-09-30	501
2019-12-31	503
2020-03-31	499
2020-06-30	10
2020-09-30	508
2020-12-31	509
2021-03-31	470
2021-06-30	475
2021-09-30	457
2021-12-31	457
2022-03-31	458
2022-06-30	460
2022-09-30	471
2022-12-31	473
2023-03-31	478
2023-06-30	465
2023-09-30	462