Quarter	US dollars
1999-03-31	30
1999-06-30	36
1999-09-30	72
1999-12-31	93
2000-03-31	96
2000-06-30	84
2000-09-30	64
2000-12-31	45
2001-03-31	48
2001-06-30	54
2001-09-30	68
2001-12-31	50
2002-03-31	48
2002-06-30	72
2002-09-30	48
2002-12-31	35
2003-03-31	27
2003-06-30	60
2003-09-30	64
2003-12-31	96
2004-03-31	103
2004-06-30	75
2004-09-30	76
2004-12-31	108
2005-03-31	87
2005-06-30	117
2005-09-30	114
2005-12-31	97
2006-03-31	114
2006-06-30	60
2006-09-30	75
2006-12-31	73
2007-03-31	81
2007-06-30	79
2007-09-30	47
2007-12-31	67
2008-03-31	53
2008-06-30	43
2008-09-30	74
2008-12-31	55
2009-03-31	45
2009-06-30	34
2009-09-30	44
2009-12-31	90
2010-03-31	66
2010-06-30	61
2010-09-30	35
2010-12-31	28
2011-03-31	51
2011-06-30	19
2011-09-30	38
2011-12-31	38
2012-03-31	41
2012-06-30	0
2012-09-30	18
2012-12-31	0
2013-03-31	5
2013-06-30	22
2013-09-30	10
2013-12-31	18
2014-03-31	11
2014-06-30	27
2014-09-30	17
2014-12-31	10
2015-03-31	8
2015-06-30	-7
2015-09-30	15
2015-12-31	6
2016-03-31	-4
2016-06-30	-10
2016-09-30	3
2016-12-31	4
2017-03-31	7
2017-06-30	0
2017-09-30	9
2017-12-31	-16
2018-03-31	18
2018-06-30	41
2018-09-30	0
2018-12-31	20
2019-03-31	-4
2019-06-30	8
2019-09-30	-13
2019-12-31	-2
2020-03-31	22
2020-06-30	8
2020-09-30	15
2020-12-31	6
2021-03-31	7
2021-06-30	6
2021-09-30	11
2021-12-31	4
2022-03-31	36
2022-06-30	42
2022-09-30	36
2022-12-31	27
2023-03-31	44
2023-06-30	33
2023-09-30	37