Quarter	US dollars
1999-09-30	5
1999-12-31	3
2000-03-31	5
2000-06-30	3
2000-09-30	6
2000-12-31	4
2001-03-31	7
2001-06-30	6
2001-09-30	4
2001-12-31	4
2002-03-31	6
2002-06-30	8
2002-09-30	6
2002-12-31	5
2003-03-31	6
2003-06-30	12
2003-09-30	12
2003-12-31	36
2004-03-31	50
2004-06-30	36
2004-09-30	47
2004-12-31	81
2005-03-31	89
2005-06-30	91
2005-09-30	124
2005-12-31	170
2006-03-31	284
2006-06-30	438
2006-09-30	374
2006-12-31	738
2007-03-31	720
2007-06-30	636
2007-09-30	693
2007-12-31	691
2008-03-31	1499
2008-06-30	979
2008-09-30	816
2008-12-31	49
2009-03-31	26
2009-06-30	13
2009-09-30	14
2009-12-31	13
2010-03-31	12
2010-06-30	16
2010-09-30	20
2010-12-31	91
2011-03-31	14
2011-06-30	16
2011-09-30	20
2011-12-31	20
2012-03-31	19
2012-06-30	20
2012-09-30	0
2012-12-31	21
2013-03-31	24
2013-06-30	18
2013-09-30	16
2013-12-31	15
2014-03-31	13
2014-06-30	14
2014-09-30	11
2014-12-31	11
2015-03-31	13
2015-06-30	11
2015-09-30	9
2015-12-31	7
2016-03-31	7
2016-06-30	7
2016-09-30	5
2016-12-31	7
2017-03-31	5
2017-06-30	3
2017-09-30	4
2017-12-31	4
2018-03-31	3
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	1
2019-06-30	1
2019-09-30	5
2019-12-31	3
2020-03-31	6
2020-06-30	7
2020-09-30	4
2020-12-31	0
2021-03-31	1
2021-06-30	3
2021-09-30	4
2021-12-31	5
2022-03-31	22
2022-06-30	37
2022-09-30	71
2022-12-31	79
2023-03-31	72
2023-06-30	80
2023-09-30	75