Quarter	US dollars
1999-03-31	3
1999-06-30	2
1999-09-30	15
1999-12-31	17
2000-03-31	27
2000-06-30	33
2000-09-30	28
2000-12-31	25
2001-03-31	35
2001-06-30	46
2001-09-30	42
2001-12-31	36
2002-03-31	41
2002-06-30	26
2002-09-30	34
2002-12-31	42
2003-03-31	37
2003-06-30	34
2003-09-30	34
2003-12-31	44
2004-03-31	44
2004-06-30	76
2004-09-30	83
2004-12-31	95
2005-03-31	136
2005-06-30	182
2005-09-30	212
2005-12-31	191
2006-03-31	254
2006-06-30	244
2006-09-30	256
2006-12-31	218
2007-03-31	204
2007-06-30	186
2007-09-30	215
2007-12-31	221
2008-03-31	169
2008-06-30	207
2008-09-30	236
2008-12-31	159
2009-03-31	162
2009-06-30	163
2009-09-30	188
2009-12-31	175
2010-03-31	146
2010-06-30	132
2010-09-30	154
2010-12-31	174
2011-03-31	187
2011-06-30	194
2011-09-30	164
2011-12-31	69
2012-03-31	133
2012-06-30	140
2012-09-30	84
2012-12-31	38
2013-03-31	256
2013-06-30	210
2013-09-30	223
2013-12-31	54
2014-03-31	222
2014-06-30	193
2014-09-30	203
2014-12-31	203
2015-03-31	193
2015-06-30	192
2015-09-30	210
2015-12-31	210
2016-03-31	38
2016-06-30	25
2016-09-30	30
2016-12-31	27
2017-03-31	42
2017-06-30	38
2017-09-30	35
2017-12-31	46
2018-03-31	24
2018-06-30	46
2018-09-30	76
2018-12-31	63
2019-03-31	53
2019-06-30	92
2019-09-30	121
2019-12-31	106
2020-03-31	110
2020-06-30	80
2020-09-30	107
2020-12-31	68
2021-03-31	84
2021-06-30	125
2021-09-30	65
2021-12-31	153
2022-03-31	86
2022-06-30	89
2022-09-30	92
2022-12-31	22
2023-03-31	15
2023-06-30	86
2023-09-30	205