Quarter	US dollars
1999-09-30	61
1999-12-31	32
2000-03-31	22
2000-06-30	26
2000-09-30	27
2000-12-31	49
2001-03-31	75
2001-06-30	76
2001-09-30	76
2001-12-31	63
2002-03-31	54
2002-06-30	60
2002-09-30	63
2002-12-31	63
2003-03-31	30
2003-06-30	40
2003-09-30	42
2003-12-31	54
2004-03-31	92
2004-06-30	56
2004-09-30	65
2004-12-31	69
2005-03-31	70
2005-06-30	65
2005-09-30	71
2005-12-31	86
2006-03-31	82
2006-06-30	139
2006-09-30	133
2006-12-31	143
2007-03-31	159
2007-06-30	169
2007-09-30	185
2007-12-31	165
2008-03-31	153
2008-06-30	177
2008-09-30	157
2008-12-31	93
2009-03-31	132
2009-06-30	124
2009-09-30	118
2009-12-31	92
2010-03-31	133
2010-06-30	151
2010-09-30	150
2010-12-31	105
2011-03-31	131
2011-06-30	119
2011-09-30	98
2011-12-31	104
2012-03-31	86
2012-06-30	86
2012-09-30	145
2012-12-31	136
2013-03-31	96
2013-06-30	152
2013-09-30	151
2013-12-31	96
2014-03-31	102
2014-06-30	94
2014-09-30	107
2014-12-31	75
2015-03-31	68
2015-06-30	69
2015-09-30	79
2015-12-31	52
2016-03-31	47
2016-06-30	34
2016-09-30	23
2016-12-31	18
2017-03-31	20
2017-06-30	30
2017-09-30	28
2017-12-31	23
2018-03-31	25
2018-06-30	8
2018-09-30	9
2018-12-31	4
2019-03-31	20
2019-06-30	3
2019-09-30	5
2019-12-31	1
2020-03-31	6
2020-06-30	-5
2020-09-30	0
2020-12-31	-5
2021-03-31	0
2021-06-30	15
2021-09-30	20
2021-12-31	13
2022-03-31	8
2022-06-30	9
2022-09-30	16
2022-12-31	7
2023-03-31	1
2023-06-30	10
2023-09-30	22