Quarter	US dollars
1999-09-30	26
1999-12-31	24
2000-03-31	67
2000-06-30	70
2000-09-30	69
2000-12-31	30
2001-03-31	26
2001-06-30	23
2001-09-30	22
2001-12-31	22
2002-03-31	23
2002-06-30	32
2002-09-30	3
2002-12-31	10
2003-03-31	9
2003-06-30	8
2003-09-30	7
2003-12-31	11
2004-03-31	9
2004-06-30	7
2004-09-30	7
2004-12-31	8
2005-03-31	43
2005-06-30	25
2005-09-30	30
2005-12-31	24
2006-03-31	28
2006-06-30	26
2006-09-30	26
2006-12-31	33
2007-03-31	33
2007-06-30	26
2007-09-30	31
2007-12-31	42
2008-03-31	32
2008-06-30	40
2008-09-30	36
2008-12-31	22
2009-03-31	24
2009-06-30	30
2009-09-30	27
2009-12-31	18
2010-03-31	9
2010-06-30	130
2010-09-30	164
2010-12-31	230
2011-03-31	27
2011-06-30	-2
2011-09-30	73
2011-12-31	15
2012-03-31	6
2012-06-30	39
2012-09-30	57
2012-12-31	110
2013-03-31	150
2013-06-30	184
2013-09-30	125
2013-12-31	142
2014-03-31	10
2014-06-30	9
2014-09-30	188
2014-12-31	131
2015-03-31	65
2015-06-30	55
2015-09-30	109
2015-12-31	120
2016-03-31	89
2016-06-30	150
2016-09-30	166
2016-12-31	95
2017-03-31	334
2017-06-30	103
2017-09-30	40
2017-12-31	65
2018-03-31	323
2018-06-30	279
2018-09-30	63
2018-12-31	10
2019-03-31	188
2019-06-30	131
2019-09-30	108
2019-12-31	82
2020-03-31	46
2020-06-30	44
2020-09-30	34
2020-12-31	34
2021-03-31	23
2021-06-30	6
2021-09-30	38
2021-12-31	27
2022-03-31	-5
2022-06-30	-9
2022-09-30	-2
2022-12-31	10
2023-03-31	24
2023-06-30	32
2023-09-30	27