Quarter	US dollars
2004-12-31	4
2005-03-31	6
2005-06-30	7
2005-09-30	5
2005-12-31	3
2006-03-31	7
2006-06-30	13
2006-09-30	7
2006-12-31	20
2007-03-31	31
2007-06-30	12
2007-09-30	20
2007-12-31	16
2008-03-31	48
2008-06-30	36
2008-09-30	32
2008-12-31	23
2009-03-31	125
2009-06-30	135
2009-09-30	278
2009-12-31	297
2010-03-31	450
2010-06-30	546
2010-09-30	621
2010-12-31	459
2011-03-31	123
2011-06-30	230
2011-09-30	499
2011-12-31	496
2012-03-31	459
2012-06-30	467
2012-09-30	535
2012-12-31	538
2013-03-31	425
2013-06-30	405
2013-09-30	410
2013-12-31	374
2014-03-31	325
2014-06-30	289
2014-09-30	240
2014-12-31	164
2015-03-31	76
2015-06-30	49
2015-09-30	53
2015-12-31	52
2016-03-31	53
2016-06-30	50
2016-09-30	43
2016-12-31	30
2017-03-31	24
2017-06-30	23
2017-09-30	19
2017-12-31	23
2018-03-31	46
2018-06-30	4
2018-09-30	8
2018-12-31	8
2019-03-31	5
2019-06-30	4
2019-09-30	4
2019-12-31	4
2020-03-31	6
2020-06-30	5
2020-09-30	5
2020-12-31	11
2021-03-31	14
2021-06-30	15
2021-09-30	392
2021-12-31	367
2022-03-31	1
2022-06-30	13
2022-09-30	16
2022-12-31	2
2023-03-31	3
2023-06-30	2
2023-09-30	4