Quarter	US dollars
1999-03-31	115
1999-06-30	99
1999-09-30	116
1999-12-31	52
2000-03-31	64
2000-06-30	98
2000-09-30	170
2000-12-31	144
2001-03-31	133
2001-06-30	144
2001-09-30	135
2001-12-31	125
2002-03-31	146
2002-06-30	243
2002-09-30	193
2002-12-31	118
2003-03-31	370
2003-06-30	211
2003-09-30	335
2003-12-31	415
2004-03-31	472
2004-06-30	272
2004-09-30	386
2004-12-31	430
2005-03-31	322
2005-06-30	284
2005-09-30	282
2005-12-31	292
2006-03-31	111
2006-06-30	73
2006-09-30	88
2006-12-31	40
2007-03-31	65
2007-06-30	58
2007-09-30	45
2007-12-31	47
2008-03-31	131
2008-06-30	36
2008-09-30	31
2008-12-31	20
2009-03-31	18
2009-06-30	15
2009-09-30	18
2009-12-31	37
2010-03-31	21
2010-06-30	17
2010-09-30	18
2010-12-31	53
2011-03-31	30
2011-06-30	45
2011-09-30	31
2011-12-31	34
2012-03-31	59
2012-06-30	51
2012-09-30	49
2012-12-31	33
2013-03-31	35
2013-06-30	31
2013-09-30	36
2013-12-31	20
2014-03-31	55
2014-06-30	66
2014-09-30	48
2014-12-31	53
2015-03-31	62
2015-06-30	53
2015-09-30	76
2015-12-31	56
2016-03-31	58
2016-06-30	48
2016-09-30	64
2016-12-31	73
2017-03-31	133
2017-06-30	84
2017-09-30	103
2017-12-31	90
2018-03-31	102
2018-06-30	75
2018-09-30	77
2018-12-31	137
2019-03-31	51
2019-06-30	32
2019-09-30	38
2019-12-31	90
2020-03-31	119
2020-06-30	259
2020-09-30	78
2020-12-31	123
2021-03-31	201
2021-06-30	399
2021-09-30	691
2021-12-31	601
2022-03-31	308
2022-06-30	209
2022-09-30	152
2022-12-31	239
2023-03-31	200
2023-06-30	226
2023-09-30	44