Quarter	US dollars
1999-03-31	4
1999-06-30	0
1999-09-30	4
1999-12-31	0
2000-03-31	7
2000-06-30	6
2000-09-30	12
2000-12-31	11
2001-03-31	25
2001-06-30	33
2001-09-30	30
2001-12-31	44
2002-03-31	20
2002-06-30	24
2002-09-30	30
2002-12-31	39
2003-03-31	80
2003-06-30	58
2003-09-30	55
2003-12-31	85
2004-03-31	74
2004-06-30	115
2004-09-30	123
2004-12-31	185
2005-03-31	176
2005-06-30	177
2005-09-30	166
2005-12-31	173
2006-03-31	129
2006-06-30	324
2006-09-30	285
2006-12-31	392
2007-03-31	145
2007-06-30	172
2007-09-30	221
2007-12-31	219
2008-03-31	256
2008-06-30	295
2008-09-30	701
2008-12-31	572
2009-03-31	532
2009-06-30	171
2009-09-30	82
2009-12-31	542
2010-03-31	495
2010-06-30	424
2010-09-30	57
2010-12-31	64
2011-03-31	150
2011-06-30	219
2011-09-30	120
2011-12-31	434
2012-03-31	346
2012-06-30	174
2012-09-30	200
2012-12-31	246
2013-03-31	122
2013-06-30	101
2013-09-30	78
2013-12-31	57
2014-03-31	69
2014-06-30	77
2014-09-30	173
2014-12-31	139
2015-03-31	114
2015-06-30	124
2015-09-30	135
2015-12-31	148
2016-03-31	165
2016-06-30	149
2016-09-30	158
2016-12-31	158
2017-03-31	13
2017-06-30	16
2017-09-30	5
2017-12-31	10
2018-03-31	25
2018-06-30	20
2018-09-30	18
2018-12-31	23
2019-03-31	37
2019-06-30	32
2019-09-30	22
2019-12-31	27
2020-03-31	20
2020-06-30	27
2020-09-30	33
2020-12-31	31
2021-03-31	25
2021-06-30	25
2021-09-30	62
2021-12-31	24
2022-03-31	25
2022-06-30	30
2022-09-30	57
2022-12-31	23
2023-03-31	18
2023-06-30	20
2023-09-30	26