Quarter	US dollars
1999-03-31	73
1999-06-30	71
1999-09-30	145
1999-12-31	85
2000-03-31	62
2000-06-30	63
2000-09-30	73
2000-12-31	75
2001-03-31	63
2001-06-30	61
2001-09-30	118
2001-12-31	141
2002-03-31	113
2002-06-30	103
2002-09-30	104
2002-12-31	104
2003-03-31	100
2003-06-30	110
2003-09-30	176
2003-12-31	79
2004-03-31	82
2004-06-30	68
2004-09-30	63
2004-12-31	61
2005-03-31	51
2005-06-30	34
2005-09-30	31
2005-12-31	334
2006-03-31	52
2006-06-30	149
2006-09-30	98
2006-12-31	91
2007-03-31	84
2007-06-30	72
2007-09-30	94
2007-12-31	58
2008-03-31	87
2008-06-30	115
2008-09-30	150
2008-12-31	136
2009-03-31	140
2009-06-30	231
2009-09-30	230
2009-12-31	211
2010-03-31	208
2010-06-30	141
2010-09-30	142
2010-12-31	140
2011-03-31	137
2011-06-30	269
2011-09-30	152
2011-12-31	106
2012-03-31	120
2012-06-30	118
2012-09-30	113
2012-12-31	109
2013-03-31	125
2013-06-30	130
2013-09-30	112
2013-12-31	142
2014-03-31	129
2014-06-30	127
2014-09-30	105
2014-12-31	76
2015-03-31	73
2015-06-30	59
2015-09-30	5
2015-12-31	7
2016-03-31	10
2016-06-30	6
2016-09-30	5
2016-12-31	6
2017-03-31	4
2017-06-30	4
2017-09-30	4
2017-12-31	3
2018-03-31	2
2018-06-30	4
2018-09-30	5
2018-12-31	2
2019-03-31	1
2019-06-30	1
2019-09-30	1
2019-12-31	2
2020-03-31	1
2020-06-30	0
2020-09-30	1
2020-12-31	1
2021-03-31	1
2021-06-30	2
2021-09-30	2
2021-12-31	1
2022-03-31	1
2022-06-30	1
2022-09-30	2
2022-12-31	3
2023-03-31	2
2023-06-30	1
2023-09-30	1