Quarter	US dollars
1999-09-30	2
1999-12-31	2
2000-03-31	3
2000-06-30	5
2000-09-30	59
2000-12-31	6
2001-03-31	3
2001-06-30	1
2001-09-30	4
2001-12-31	3
2002-03-31	1
2002-06-30	3
2002-09-30	11
2002-12-31	63
2003-03-31	14
2003-06-30	13
2003-09-30	8
2003-12-31	7
2004-03-31	6
2004-06-30	2
2004-09-30	5
2004-12-31	15
2005-03-31	9
2005-06-30	5
2005-09-30	16
2005-12-31	10
2006-03-31	222
2006-06-30	231
2006-09-30	893
2006-12-31	1072
2007-03-31	59
2007-06-30	60
2007-09-30	77
2007-12-31	102
2008-03-31	72
2008-06-30	155
2008-09-30	137
2008-12-31	185
2009-03-31	204
2009-06-30	196
2009-09-30	216
2009-12-31	197
2010-03-31	314
2010-06-30	206
2010-09-30	60
2010-12-31	33
2011-03-31	29
2011-06-30	32
2011-09-30	70
2011-12-31	65
2012-03-31	96
2012-06-30	96
2012-09-30	95
2012-12-31	97
2013-03-31	71
2013-06-30	55
2013-09-30	58
2013-12-31	104
2014-03-31	58
2014-06-30	56
2014-09-30	57
2014-12-31	89
2015-03-31	80
2015-06-30	71
2015-09-30	74
2015-12-31	74
2016-03-31	72
2016-06-30	55
2016-09-30	45
2016-12-31	33
2017-03-31	30
2017-06-30	30
2017-09-30	24
2017-12-31	22
2018-03-31	18
2018-06-30	16
2018-09-30	16
2018-12-31	13
2019-03-31	7
2019-06-30	8
2019-09-30	6
2019-12-31	5
2020-03-31	36
2020-06-30	7
2020-09-30	4
2020-12-31	5
2021-03-31	6
2021-06-30	11
2021-09-30	26
2021-12-31	1
2022-03-31	11
2022-06-30	1
2022-09-30	31
2022-12-31	1
2023-03-31	1
2023-06-30	4
2023-09-30	21