Quarter	US dollars
1999-03-31	59
1999-06-30	65
1999-09-30	62
1999-12-31	59
2000-03-31	48
2000-06-30	45
2000-09-30	44
2000-12-31	43
2001-03-31	44
2001-06-30	44
2001-09-30	45
2001-12-31	45
2002-03-31	41
2002-06-30	43
2002-09-30	44
2002-12-31	43
2003-03-31	43
2003-06-30	42
2003-09-30	42
2003-12-31	43
2004-03-31	46
2004-06-30	44
2004-09-30	44
2004-12-31	46
2005-03-31	46
2005-06-30	45
2005-09-30	97
2005-12-31	43
2006-03-31	55
2006-06-30	52
2006-09-30	41
2006-12-31	42
2007-03-31	41
2007-06-30	43
2007-09-30	43
2007-12-31	36
2008-03-31	43
2008-06-30	46
2008-09-30	41
2008-12-31	35
2009-03-31	36
2009-06-30	35
2009-09-30	54
2009-12-31	37
2010-03-31	61
2010-06-30	39
2010-09-30	33
2010-12-31	55
2011-03-31	31
2011-06-30	35
2011-09-30	73
2011-12-31	82
2012-03-31	40
2012-06-30	36
2012-09-30	36
2012-12-31	67
2013-03-31	32
2013-06-30	32
2013-09-30	30
2013-12-31	30
2014-03-31	28
2014-06-30	26
2014-09-30	44
2014-12-31	27
2015-03-31	26
2015-06-30	77
2015-09-30	46
2015-12-31	106
2016-03-31	75
2016-06-30	77
2016-09-30	64
2016-12-31	69
2017-03-31	63
2017-06-30	81
2017-09-30	91
2017-12-31	128
2018-03-31	141
2018-06-30	104
2018-09-30	47
2018-12-31	68
2019-03-31	83
2019-06-30	74
2019-09-30	132
2019-12-31	87
2020-03-31	86
2020-06-30	80
2020-09-30	111
2020-12-31	156
2021-03-31	195
2021-06-30	254
2021-09-30	316
2021-12-31	469
2022-03-31	376
2022-06-30	532
2022-09-30	632
2022-12-31	539
2023-03-31	738
2023-06-30	526
2023-09-30	642