Quarter	US dollars
1999-03-31	118
1999-06-30	91
1999-09-30	106
1999-12-31	76
2000-03-31	55
2000-06-30	52
2000-09-30	47
2000-12-31	51
2001-03-31	48
2001-06-30	45
2001-09-30	53
2001-12-31	30
2002-03-31	81
2002-06-30	67
2002-09-30	44
2002-12-31	57
2003-03-31	60
2003-06-30	54
2003-09-30	19
2003-12-31	111
2004-03-31	41
2004-06-30	113
2004-09-30	45
2004-12-31	175
2005-03-31	238
2005-06-30	100
2005-09-30	107
2005-12-31	90
2006-03-31	9
2006-06-30	19
2006-09-30	18
2006-12-31	55
2007-03-31	171
2007-06-30	231
2007-09-30	295
2007-12-31	29
2008-03-31	88
2008-06-30	19
2008-09-30	97
2008-12-31	7
2009-03-31	10
2009-06-30	7
2009-09-30	22
2009-12-31	21
2010-03-31	45
2010-06-30	59
2010-09-30	12
2010-12-31	24
2011-03-31	20
2011-06-30	69
2011-09-30	31
2011-12-31	15
2012-03-31	15
2012-06-30	3
2012-09-30	12
2012-12-31	51
2013-03-31	31
2013-06-30	5
2013-09-30	30
2013-12-31	2
2014-03-31	11
2014-06-30	13
2014-09-30	16
2014-12-31	5
2015-03-31	17
2015-06-30	5
2015-09-30	8
2015-12-31	9
2016-03-31	5
2016-06-30	64
2016-09-30	4
2016-12-31	19
2017-03-31	1
2017-06-30	2
2017-09-30	1
2017-12-31	1
2018-03-31	2
2018-06-30	1
2018-09-30	12
2018-12-31	0
2019-03-31	-1
2019-06-30	5
2019-09-30	6
2019-12-31	28
2020-03-31	110
2020-06-30	140
2020-09-30	448
2020-12-31	18
2021-03-31	20
2021-06-30	11
2021-09-30	28
2021-12-31	15
2022-03-31	23
2022-06-30	16
2022-09-30	16
2022-12-31	19
2023-03-31	19
2023-06-30	16
2023-09-30	19