Quarter	US dollars
1999-03-31	3
1999-06-30	3
1999-09-30	2
1999-12-31	3
2000-03-31	2
2000-06-30	2
2000-09-30	3
2000-12-31	3
2001-03-31	2
2001-06-30	46
2001-09-30	18
2001-12-31	18
2002-03-31	30
2002-06-30	17
2002-09-30	19
2002-12-31	19
2003-03-31	15
2003-06-30	5
2003-09-30	29
2003-12-31	288
2004-03-31	326
2004-06-30	237
2004-09-30	180
2004-12-31	59
2005-03-31	37
2005-06-30	21
2005-09-30	18
2005-12-31	17
2006-03-31	31
2006-06-30	18
2006-09-30	18
2006-12-31	18
2007-03-31	21
2007-06-30	7
2007-09-30	5
2007-12-31	4
2008-03-31	12
2008-06-30	9
2008-09-30	10
2008-12-31	7
2009-03-31	9
2009-06-30	6
2009-09-30	10
2009-12-31	5
2010-03-31	9
2010-06-30	7
2010-09-30	5
2010-12-31	7
2011-03-31	7
2011-06-30	6
2011-09-30	9
2011-12-31	6
2012-03-31	7
2012-06-30	6
2012-09-30	11
2012-12-31	11
2013-03-31	46
2013-06-30	41
2013-09-30	24
2013-12-31	8
2014-03-31	10
2014-06-30	14
2014-09-30	11
2014-12-31	8
2015-03-31	8
2015-06-30	8
2015-09-30	5
2015-12-31	2
2016-03-31	3
2016-06-30	2
2016-09-30	2
2016-12-31	2
2017-03-31	2
2017-06-30	2
2017-09-30	2
2017-12-31	2
2018-03-31	2
2018-06-30	1
2018-09-30	2
2018-12-31	2
2019-03-31	2
2019-06-30	2
2019-09-30	1
2019-12-31	1
2020-03-31	1
2020-06-30	2
2020-09-30	1
2020-12-31	1
2021-03-31	1
2021-06-30	2
2021-09-30	1
2021-12-31	2
2022-03-31	2
2022-06-30	2
2022-09-30	2
2022-12-31	4
2023-03-31	3
2023-06-30	21
2023-09-30	5