Quarter	US dollars
1999-09-30	81
1999-12-31	68
2000-03-31	73
2000-06-30	70
2000-09-30	59
2000-12-31	63
2001-03-31	63
2001-06-30	18
2001-09-30	19
2001-12-31	10
2002-03-31	1
2002-06-30	3
2002-09-30	3
2002-12-31	5
2003-03-31	5
2003-06-30	10
2003-09-30	10
2003-12-31	9
2004-03-31	9
2004-06-30	11
2004-09-30	81
2004-12-31	79
2005-03-31	78
2005-06-30	161
2005-09-30	53
2005-12-31	65
2006-03-31	76
2006-06-30	172
2006-09-30	295
2006-12-31	303
2007-03-31	261
2007-06-30	281
2007-09-30	226
2007-12-31	323
2008-03-31	338
2008-06-30	521
2008-09-30	424
2008-12-31	260
2009-03-31	215
2009-06-30	188
2009-09-30	320
2009-12-31	312
2010-03-31	317
2010-06-30	272
2010-09-30	98
2010-12-31	219
2011-03-31	747
2011-06-30	737
2011-09-30	804
2011-12-31	663
2012-03-31	658
2012-06-30	593
2012-09-30	573
2012-12-31	707
2013-03-31	625
2013-06-30	452
2013-09-30	402
2013-12-31	319
2014-03-31	343
2014-06-30	491
2014-09-30	331
2014-12-31	361
2015-03-31	439
2015-06-30	371
2015-09-30	359
2015-12-31	459
2016-03-31	348
2016-06-30	277
2016-09-30	251
2016-12-31	198
2017-03-31	121
2017-06-30	162
2017-09-30	141
2017-12-31	68
2018-03-31	22
2018-06-30	58
2018-09-30	95
2018-12-31	66
2019-03-31	81
2019-06-30	109
2019-09-30	89
2019-12-31	32
2020-03-31	156
2020-06-30	143
2020-09-30	-16
2020-12-31	-23
2021-03-31	-22
2021-06-30	-25
2021-09-30	-19
2021-12-31	-44
2022-03-31	49
2022-06-30	14
2022-09-30	85
2022-12-31	55
2023-03-31	23
2023-06-30	99
2023-09-30	71