Quarter	US dollars
1999-03-31	7
1999-06-30	8
1999-09-30	10
1999-12-31	6
2000-03-31	5
2000-06-30	5
2000-09-30	8
2000-12-31	9
2001-03-31	5
2001-06-30	10
2001-09-30	12
2001-12-31	22
2002-03-31	12
2002-06-30	16
2002-09-30	16
2002-12-31	23
2003-03-31	11
2003-06-30	7
2003-09-30	16
2003-12-31	7
2004-03-31	6
2004-06-30	17
2004-09-30	12
2004-12-31	15
2005-03-31	14
2005-06-30	19
2005-09-30	11
2005-12-31	28
2006-03-31	64
2006-06-30	83
2006-09-30	60
2006-12-31	57
2007-03-31	36
2007-06-30	87
2007-09-30	95
2007-12-31	123
2008-03-31	103
2008-06-30	55
2008-09-30	82
2008-12-31	54
2009-03-31	26
2009-06-30	15
2009-09-30	20
2009-12-31	30
2010-03-31	21
2010-06-30	15
2010-09-30	19
2010-12-31	21
2011-03-31	15
2011-06-30	16
2011-09-30	30
2011-12-31	24
2012-03-31	25
2012-06-30	19
2012-09-30	61
2012-12-31	156
2013-03-31	50
2013-06-30	84
2013-09-30	72
2013-12-31	122
2014-03-31	95
2014-06-30	67
2014-09-30	84
2014-12-31	103
2015-03-31	97
2015-06-30	67
2015-09-30	82
2015-12-31	69
2016-03-31	46
2016-06-30	56
2016-09-30	53
2016-12-31	66
2017-03-31	41
2017-06-30	56
2017-09-30	72
2017-12-31	98
2018-03-31	73
2018-06-30	61
2018-09-30	36
2018-12-31	51
2019-03-31	44
2019-06-30	46
2019-09-30	58
2019-12-31	42
2020-03-31	36
2020-06-30	33
2020-09-30	33
2020-12-31	43
2021-03-31	50
2021-06-30	53
2021-09-30	52
2021-12-31	60
2022-03-31	59
2022-06-30	86
2022-09-30	96
2022-12-31	111
2023-03-31	67
2023-06-30	75
2023-09-30	95