Quarter	US dollars
2004-12-31	2
2005-03-31	4
2005-06-30	4
2005-09-30	5
2005-12-31	21
2006-03-31	3
2006-06-30	4
2006-09-30	4
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	43
2008-12-31	16
2009-03-31	16
2009-06-30	13
2009-09-30	19
2009-12-31	23
2010-03-31	27
2010-06-30	55
2010-09-30	35
2010-12-31	25
2011-03-31	72
2011-06-30	45
2011-09-30	148
2011-12-31	124
2012-03-31	53
2012-06-30	44
2012-09-30	415
2012-12-31	524
2013-03-31	437
2013-06-30	290
2013-09-30	363
2013-12-31	192
2014-03-31	183
2014-06-30	87
2014-09-30	73
2014-12-31	181
2015-03-31	174
2015-06-30	159
2015-09-30	206
2015-12-31	203
2016-03-31	203
2016-06-30	205
2016-09-30	204
2016-12-31	90
2017-03-31	69
2017-06-30	117
2017-09-30	42
2017-12-31	38
2018-03-31	31
2018-06-30	29
2018-09-30	27
2018-12-31	13
2019-03-31	3
2019-06-30	3
2019-09-30	2
2019-12-31	8
2020-03-31	7
2020-06-30	7
2020-09-30	6
2020-12-31	7
2021-03-31	11
2021-06-30	11
2021-09-30	11
2021-12-31	18
2022-03-31	16
2022-06-30	39
2022-09-30	26
2022-12-31	29
2023-03-31	28
2023-06-30	29
2023-09-30	31