Quarter	US dollars
1999-09-30	15
1999-12-31	34
2000-03-31	27
2000-06-30	12
2000-09-30	40
2000-12-31	22
2001-03-31	26
2001-06-30	15
2001-09-30	22
2001-12-31	16
2002-03-31	17
2002-06-30	37
2002-09-30	66
2002-12-31	77
2003-03-31	79
2003-06-30	163
2003-09-30	176
2003-12-31	278
2004-03-31	463
2004-06-30	283
2004-09-30	206
2004-12-31	113
2005-03-31	49
2005-06-30	43
2005-09-30	44
2005-12-31	55
2006-03-31	56
2006-06-30	39
2006-09-30	47
2006-12-31	78
2007-03-31	82
2007-06-30	116
2007-09-30	122
2007-12-31	119
2008-03-31	131
2008-06-30	221
2008-09-30	292
2008-12-31	275
2009-03-31	666
2009-06-30	133
2009-09-30	136
2009-12-31	123
2010-03-31	143
2010-06-30	432
2010-09-30	208
2010-12-31	534
2011-03-31	263
2011-06-30	148
2011-09-30	400
2011-12-31	209
2012-03-31	82
2012-06-30	129
2012-09-30	68
2012-12-31	89
2013-03-31	62
2013-06-30	65
2013-09-30	68
2013-12-31	74
2014-03-31	68
2014-06-30	115
2014-09-30	144
2014-12-31	66
2015-03-31	134
2015-06-30	79
2015-09-30	189
2015-12-31	135
2016-03-31	188
2016-06-30	161
2016-09-30	104
2016-12-31	85
2017-03-31	59
2017-06-30	116
2017-09-30	99
2017-12-31	59
2018-03-31	58
2018-06-30	38
2018-09-30	70
2018-12-31	45
2019-03-31	33
2019-06-30	32
2019-09-30	31
2019-12-31	40
2020-03-31	119
2020-06-30	96
2020-09-30	89
2020-12-31	89
2021-03-31	50
2021-06-30	35
2021-09-30	27
2021-12-31	36
2022-03-31	78
2022-06-30	77
2022-09-30	105
2022-12-31	64
2023-03-31	74
2023-06-30	52
2023-09-30	47