Quarter	US dollars
2004-12-31	4
2005-03-31	2
2005-06-30	16
2005-09-30	9
2005-12-31	24
2006-03-31	7
2006-06-30	6
2006-09-30	6
2006-12-31	4
2007-03-31	10
2007-06-30	6
2007-09-30	6
2007-12-31	16
2008-03-31	8
2008-06-30	32
2008-09-30	46
2008-12-31	17
2009-03-31	19
2009-06-30	15
2009-09-30	24
2009-12-31	32
2010-03-31	42
2010-06-30	61
2010-09-30	39
2010-12-31	28
2011-03-31	75
2011-06-30	40
2011-09-30	146
2011-12-31	96
2012-03-31	50
2012-06-30	42
2012-09-30	29
2012-12-31	141
2013-03-31	436
2013-06-30	288
2013-09-30	361
2013-12-31	172
2014-03-31	190
2014-06-30	91
2014-09-30	73
2014-12-31	73
2015-03-31	40
2015-06-30	25
2015-09-30	8
2015-12-31	3
2016-03-31	4
2016-06-30	7
2016-09-30	8
2016-12-31	4
2017-03-31	6
2017-06-30	3
2017-09-30	3
2017-12-31	3
2018-03-31	3
2018-06-30	12
2018-09-30	9
2018-12-31	10
2019-03-31	13
2019-06-30	14
2019-09-30	15
2019-12-31	15
2020-03-31	16
2020-06-30	12
2020-09-30	12
2020-12-31	11
2021-03-31	14
2021-06-30	12
2021-09-30	12
2021-12-31	8
2022-03-31	13
2022-06-30	21
2022-09-30	15
2022-12-31	15
2023-03-31	12
2023-06-30	16
2023-09-30	15