Quarter	US dollars
1999-03-31	22
1999-06-30	18
1999-09-30	20
1999-12-31	27
2000-03-31	23
2000-06-30	30
2000-09-30	24
2000-12-31	25
2001-03-31	28
2001-06-30	27
2001-09-30	87
2001-12-31	28
2002-03-31	21
2002-06-30	22
2002-09-30	36
2002-12-31	53
2003-03-31	73
2003-06-30	107
2003-09-30	99
2003-12-31	107
2004-03-31	130
2004-06-30	147
2004-09-30	168
2004-12-31	186
2005-03-31	170
2005-06-30	48
2005-09-30	29
2005-12-31	30
2006-03-31	28
2006-06-30	35
2006-09-30	35
2006-12-31	40
2007-03-31	41
2007-06-30	38
2007-09-30	73
2007-12-31	49
2008-03-31	103
2008-06-30	60
2008-09-30	59
2008-12-31	35
2009-03-31	34
2009-06-30	30
2009-09-30	28
2009-12-31	33
2010-03-31	28
2010-06-30	24
2010-09-30	130
2010-12-31	80
2011-03-31	24
2011-06-30	41
2011-09-30	40
2011-12-31	50
2012-03-31	48
2012-06-30	51
2012-09-30	45
2012-12-31	40
2013-03-31	37
2013-06-30	38
2013-09-30	40
2013-12-31	35
2014-03-31	51
2014-06-30	47
2014-09-30	44
2014-12-31	42
2015-03-31	46
2015-06-30	29
2015-09-30	53
2015-12-31	43
2016-03-31	59
2016-06-30	39
2016-09-30	40
2016-12-31	50
2017-03-31	44
2017-06-30	77
2017-09-30	89
2017-12-31	65
2018-03-31	45
2018-06-30	49
2018-09-30	59
2018-12-31	50
2019-03-31	64
2019-06-30	71
2019-09-30	90
2019-12-31	75
2020-03-31	80
2020-06-30	49
2020-09-30	60
2020-12-31	52
2021-03-31	45
2021-06-30	52
2021-09-30	47
2021-12-31	66
2022-03-31	58
2022-06-30	53
2022-09-30	75
2022-12-31	83
2023-03-31	69
2023-06-30	64
2023-09-30	63