Quarter	US dollars
2004-12-31	2
2005-03-31	8
2005-06-30	7
2005-09-30	11
2005-12-31	10
2006-03-31	19
2006-06-30	9
2006-09-30	7
2006-12-31	31
2007-03-31	35
2007-06-30	54
2007-09-30	49
2007-12-31	42
2008-03-31	34
2008-06-30	113
2008-09-30	134
2008-12-31	155
2009-03-31	152
2009-06-30	171
2009-09-30	173
2009-12-31	182
2010-03-31	162
2010-06-30	156
2010-09-30	159
2010-12-31	153
2011-03-31	152
2011-06-30	146
2011-09-30	145
2011-12-31	139
2012-03-31	139
2012-06-30	130
2012-09-30	128
2012-12-31	108
2013-03-31	106
2013-06-30	67
2013-09-30	68
2013-12-31	93
2014-03-31	63
2014-06-30	77
2014-09-30	86
2014-12-31	81
2015-03-31	80
2015-06-30	74
2015-09-30	120
2015-12-31	119
2016-03-31	111
2016-06-30	85
2016-09-30	74
2016-12-31	71
2017-03-31	71
2017-06-30	36
2017-09-30	38
2017-12-31	14
2018-03-31	39
2018-06-30	38
2018-09-30	39
2018-12-31	40
2019-03-31	39
2019-06-30	37
2019-09-30	68
2019-12-31	67
2020-03-31	67
2020-06-30	67
2020-09-30	67
2020-12-31	67
2021-03-31	68
2021-06-30	68
2021-09-30	67
2021-12-31	67
2022-03-31	67
2022-06-30	67
2022-09-30	67
2022-12-31	67
2023-03-31	33
2023-06-30	33
2023-09-30	33