Quarter	US dollars
1999-09-30	0
1999-12-31	0
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	1
2001-03-31	4
2001-06-30	10
2001-09-30	3
2001-12-31	6
2002-03-31	4
2002-06-30	5
2002-09-30	13
2002-12-31	8
2003-03-31	3
2003-06-30	17
2003-09-30	18
2003-12-31	11
2004-03-31	20
2004-06-30	13
2004-09-30	11
2004-12-31	12
2005-03-31	9
2005-06-30	5
2005-09-30	7
2005-12-31	0
2006-03-31	0
2006-06-30	2
2006-09-30	2
2006-12-31	0
2007-03-31	6
2007-06-30	22
2007-09-30	16
2007-12-31	8
2008-03-31	36
2008-06-30	285
2008-09-30	271
2008-12-31	283
2009-03-31	311
2009-06-30	308
2009-09-30	336
2009-12-31	326
2010-03-31	426
2010-06-30	525
2010-09-30	181
2010-12-31	152
2011-03-31	484
2011-06-30	541
2011-09-30	662
2011-12-31	496
2012-03-31	486
2012-06-30	493
2012-09-30	454
2012-12-31	480
2013-03-31	76
2013-06-30	403
2013-09-30	387
2013-12-31	350
2014-03-31	88
2014-06-30	51
2014-09-30	92
2014-12-31	173
2015-03-31	186
2015-06-30	142
2015-09-30	238
2015-12-31	227
2016-03-31	139
2016-06-30	583
2016-09-30	81
2016-12-31	69
2017-03-31	75
2017-06-30	58
2017-09-30	27
2017-12-31	161
2018-03-31	152
2018-06-30	149
2018-09-30	117
2018-12-31	115
2019-03-31	43
2019-06-30	95
2019-09-30	103
2019-12-31	94
2020-03-31	296
2020-06-30	96
2020-09-30	120
2020-12-31	60
2021-03-31	87
2021-06-30	93
2021-09-30	55
2021-12-31	97
2022-03-31	68
2022-06-30	142
2022-09-30	161
2022-12-31	108
2023-03-31	87
2023-06-30	55
2023-09-30	60