Quarter	US dollars
1999-09-30	18
1999-12-31	10
2000-03-31	10
2000-06-30	27
2000-09-30	37
2000-12-31	24
2001-03-31	20
2001-06-30	20
2001-09-30	37
2001-12-31	23
2002-03-31	34
2002-06-30	64
2002-09-30	42
2002-12-31	39
2003-03-31	41
2003-06-30	68
2003-09-30	55
2003-12-31	45
2004-03-31	55
2004-06-30	92
2004-09-30	54
2004-12-31	54
2005-03-31	60
2005-06-30	111
2005-09-30	179
2005-12-31	137
2006-03-31	163
2006-06-30	150
2006-09-30	125
2006-12-31	82
2007-03-31	129
2007-06-30	144
2007-09-30	31
2007-12-31	213
2008-03-31	688
2008-06-30	710
2008-09-30	606
2008-12-31	1975
2009-03-31	1045
2009-06-30	575
2009-09-30	523
2009-12-31	457
2010-03-31	579
2010-06-30	1103
2010-09-30	685
2010-12-31	1022
2011-03-31	813
2011-06-30	1052
2011-09-30	871
2011-12-31	753
2012-03-31	583
2012-06-30	475
2012-09-30	585
2012-12-31	496
2013-03-31	553
2013-06-30	607
2013-09-30	941
2013-12-31	891
2014-03-31	579
2014-06-30	785
2014-09-30	545
2014-12-31	609
2015-03-31	649
2015-06-30	623
2015-09-30	991
2015-12-31	456
2016-03-31	426
2016-06-30	360
2016-09-30	744
2016-12-31	272
2017-03-31	234
2017-06-30	170
2017-09-30	129
2017-12-31	82
2018-03-31	70
2018-06-30	133
2018-09-30	137
2018-12-31	110
2019-03-31	89
2019-06-30	123
2019-09-30	115
2019-12-31	147
2020-03-31	969
2020-06-30	253
2020-09-30	222
2020-12-31	265
2021-03-31	182
2021-06-30	152
2021-09-30	112
2021-12-31	102
2022-03-31	80
2022-06-30	131
2022-09-30	199
2022-12-31	172
2023-03-31	58
2023-06-30	93
2023-09-30	134