Quarter	US dollars
1999-03-31	25
1999-06-30	41
1999-09-30	38
1999-12-31	50
2000-03-31	112
2000-06-30	123
2000-09-30	126
2000-12-31	103
2001-03-31	107
2001-06-30	116
2001-09-30	116
2001-12-31	115
2002-03-31	93
2002-06-30	87
2002-09-30	76
2002-12-31	79
2003-03-31	80
2003-06-30	66
2003-09-30	102
2003-12-31	90
2004-03-31	92
2004-06-30	82
2004-09-30	90
2004-12-31	227
2005-03-31	334
2005-06-30	232
2005-09-30	227
2005-12-31	234
2006-03-31	257
2006-06-30	251
2006-09-30	229
2006-12-31	235
2007-03-31	230
2007-06-30	214
2007-09-30	188
2007-12-31	181
2008-03-31	362
2008-06-30	241
2008-09-30	235
2008-12-31	510
2009-03-31	203
2009-06-30	525
2009-09-30	524
2009-12-31	182
2010-03-31	178
2010-06-30	187
2010-09-30	197
2010-12-31	424
2011-03-31	226
2011-06-30	225
2011-09-30	261
2011-12-31	244
2012-03-31	98
2012-06-30	14
2012-09-30	129
2012-12-31	127
2013-03-31	133
2013-06-30	123
2013-09-30	111
2013-12-31	71
2014-03-31	81
2014-06-30	79
2014-09-30	37
2014-12-31	17
2015-03-31	18
2015-06-30	18
2015-09-30	29
2015-12-31	26
2016-03-31	10
2016-06-30	25
2016-09-30	67
2016-12-31	110
2017-03-31	93
2017-06-30	92
2017-09-30	89
2017-12-31	95
2018-03-31	102
2018-06-30	95
2018-09-30	89
2018-12-31	66
2019-03-31	62
2019-06-30	59
2019-09-30	166
2019-12-31	55
2020-03-31	54
2020-06-30	82
2020-09-30	47
2020-12-31	49
2021-03-31	62
2021-06-30	29
2021-09-30	20
2021-12-31	34
2022-03-31	8
2022-06-30	52
2022-09-30	93
2022-12-31	23
2023-03-31	16
2023-06-30	140
2023-09-30	87