Quarter	US dollars
1999-09-30	10
1999-12-31	6
2000-03-31	19
2000-06-30	9
2000-09-30	37
2000-12-31	39
2001-03-31	37
2001-06-30	34
2001-09-30	37
2001-12-31	33
2002-03-31	3
2002-06-30	2
2002-09-30	6
2002-12-31	13
2003-03-31	27
2003-06-30	36
2003-09-30	13
2003-12-31	36
2004-03-31	37
2004-06-30	47
2004-09-30	139
2004-12-31	140
2005-03-31	132
2005-06-30	86
2005-09-30	42
2005-12-31	55
2006-03-31	64
2006-06-30	122
2006-09-30	149
2006-12-31	123
2007-03-31	124
2007-06-30	142
2007-09-30	106
2007-12-31	80
2008-03-31	274
2008-06-30	426
2008-09-30	121
2008-12-31	73
2009-03-31	288
2009-06-30	275
2009-09-30	267
2009-12-31	182
2010-03-31	296
2010-06-30	197
2010-09-30	427
2010-12-31	426
2011-03-31	466
2011-06-30	483
2011-09-30	517
2011-12-31	819
2012-03-31	686
2012-06-30	488
2012-09-30	1030
2012-12-31	386
2013-03-31	366
2013-06-30	123
2013-09-30	34
2013-12-31	30
2014-03-31	57
2014-06-30	67
2014-09-30	71
2014-12-31	443
2015-03-31	21
2015-06-30	5
2015-09-30	15
2015-12-31	7
2016-03-31	29
2016-06-30	23
2016-09-30	22
2016-12-31	17
2017-03-31	4
2017-06-30	44
2017-09-30	42
2017-12-31	41
2018-03-31	32
2018-06-30	7
2018-09-30	48
2018-12-31	18
2019-03-31	26
2019-06-30	39
2019-09-30	111
2019-12-31	33
2020-03-31	29
2020-06-30	19
2020-09-30	39
2020-12-31	51
2021-03-31	29
2021-06-30	3
2021-09-30	47
2021-12-31	15
2022-03-31	32
2022-06-30	10
2022-09-30	35
2022-12-31	18
2023-03-31	20
2023-06-30	2
2023-09-30	26