Quarter	US dollars
1999-03-31	71
1999-06-30	42
1999-09-30	60
1999-12-31	54
2000-03-31	52
2000-06-30	61
2000-09-30	53
2000-12-31	78
2001-03-31	103
2001-06-30	69
2001-09-30	96
2001-12-31	85
2002-03-31	72
2002-06-30	56
2002-09-30	72
2002-12-31	66
2003-03-31	56
2003-06-30	62
2003-09-30	67
2003-12-31	66
2004-03-31	84
2004-06-30	69
2004-09-30	132
2004-12-31	120
2005-03-31	109
2005-06-30	91
2005-09-30	107
2005-12-31	61
2006-03-31	97
2006-06-30	292
2006-09-30	215
2006-12-31	246
2007-03-31	192
2007-06-30	184
2007-09-30	200
2007-12-31	239
2008-03-31	289
2008-06-30	288
2008-09-30	162
2008-12-31	69
2009-03-31	80
2009-06-30	85
2009-09-30	86
2009-12-31	74
2010-03-31	67
2010-06-30	70
2010-09-30	41
2010-12-31	43
2011-03-31	28
2011-06-30	28
2011-09-30	39
2011-12-31	75
2012-03-31	32
2012-06-30	67
2012-09-30	68
2012-12-31	101
2013-03-31	128
2013-06-30	75
2013-09-30	73
2013-12-31	57
2014-03-31	75
2014-06-30	77
2014-09-30	46
2014-12-31	57
2015-03-31	63
2015-06-30	72
2015-09-30	74
2015-12-31	73
2016-03-31	50
2016-06-30	17
2016-09-30	17
2016-12-31	20
2017-03-31	104
2017-06-30	127
2017-09-30	164
2017-12-31	108
2018-03-31	91
2018-06-30	101
2018-09-30	280
2018-12-31	127
2019-03-31	62
2019-06-30	128
2019-09-30	212
2019-12-31	249
2020-03-31	164
2020-06-30	250
2020-09-30	123
2020-12-31	186
2021-03-31	184
2021-06-30	148
2021-09-30	164
2021-12-31	198
2022-03-31	136
2022-06-30	175
2022-09-30	161
2022-12-31	215
2023-03-31	219
2023-06-30	454
2023-09-30	471