Quarter	US dollars
1999-03-31	47
1999-06-30	53
1999-09-30	88
1999-12-31	47
2000-03-31	42
2000-06-30	40
2000-09-30	41
2000-12-31	43
2001-03-31	42
2001-06-30	41
2001-09-30	42
2001-12-31	42
2002-03-31	43
2002-06-30	42
2002-09-30	47
2002-12-31	48
2003-03-31	53
2003-06-30	52
2003-09-30	12
2003-12-31	8
2004-03-31	12
2004-06-30	12
2004-09-30	13
2004-12-31	13
2005-03-31	17
2005-06-30	14
2005-09-30	25
2005-12-31	26
2006-03-31	25
2006-06-30	38
2006-09-30	36
2006-12-31	32
2007-03-31	48
2007-06-30	55
2007-09-30	75
2007-12-31	76
2008-03-31	53
2008-06-30	31
2008-09-30	58
2008-12-31	49
2009-03-31	32
2009-06-30	29
2009-09-30	49
2009-12-31	56
2010-03-31	21
2010-06-30	57
2010-09-30	47
2010-12-31	34
2011-03-31	31
2011-06-30	38
2011-09-30	75
2011-12-31	45
2012-03-31	48
2012-06-30	38
2012-09-30	68
2012-12-31	59
2013-03-31	35
2013-06-30	32
2013-09-30	62
2013-12-31	73
2014-03-31	44
2014-06-30	89
2014-09-30	117
2014-12-31	40
2015-03-31	31
2015-06-30	51
2015-09-30	54
2015-12-31	25
2016-03-31	0
2016-06-30	0
2016-09-30	19
2016-12-31	19
2017-03-31	39
2017-06-30	51
2017-09-30	29
2017-12-31	49
2018-03-31	98
2018-06-30	74
2018-09-30	84
2018-12-31	91
2019-03-31	38
2019-06-30	31
2019-09-30	38
2019-12-31	38
2020-03-31	74
2020-06-30	72
2020-09-30	39
2020-12-31	70
2021-03-31	65
2021-06-30	25
2021-09-30	28
2021-12-31	34
2022-03-31	31
2022-06-30	29
2022-09-30	63
2022-12-31	57
2023-03-31	19
2023-06-30	16
2023-09-30	14