Quarter	US dollars
1999-09-30	31
1999-12-31	58
2000-03-31	16
2000-06-30	3
2000-09-30	13
2000-12-31	15
2001-03-31	27
2001-06-30	17
2001-09-30	21
2001-12-31	17
2002-03-31	16
2002-06-30	75
2002-09-30	49
2002-12-31	58
2003-03-31	66
2003-06-30	53
2003-09-30	105
2003-12-31	172
2004-03-31	178
2004-06-30	138
2004-09-30	179
2004-12-31	223
2005-03-31	221
2005-06-30	276
2005-09-30	320
2005-12-31	402
2006-03-31	494
2006-06-30	568
2006-09-30	633
2006-12-31	663
2007-03-31	681
2007-06-30	630
2007-09-30	778
2007-12-31	878
2008-03-31	932
2008-06-30	1003
2008-09-30	781
2008-12-31	887
2009-03-31	917
2009-06-30	835
2009-09-30	918
2009-12-31	966
2010-03-31	915
2010-06-30	1010
2010-09-30	1360
2010-12-31	412
2011-03-31	139
2011-06-30	156
2011-09-30	189
2011-12-31	142
2012-03-31	224
2012-06-30	229
2012-09-30	137
2012-12-31	296
2013-03-31	278
2013-06-30	232
2013-09-30	232
2013-12-31	236
2014-03-31	253
2014-06-30	250
2014-09-30	242
2014-12-31	259
2015-03-31	236
2015-06-30	68
2015-09-30	32
2015-12-31	34
2016-03-31	27
2016-06-30	86
2016-09-30	47
2016-12-31	33
2017-03-31	23
2017-06-30	21
2017-09-30	13
2017-12-31	9
2018-03-31	11
2018-06-30	17
2018-09-30	10
2018-12-31	8
2019-03-31	8
2019-06-30	14
2019-09-30	14
2019-12-31	7
2020-03-31	12
2020-06-30	16
2020-09-30	18
2020-12-31	20
2021-03-31	7
2021-06-30	8
2021-09-30	4
2021-12-31	3
2022-03-31	4
2022-06-30	10
2022-09-30	21
2022-12-31	5
2023-03-31	2
2023-06-30	1
2023-09-30	17