Quarter	US dollars
1999-03-31	0
1999-06-30	0
1999-09-30	0
1999-12-31	0
2000-03-31	17
2000-06-30	0
2000-09-30	1
2000-12-31	0
2001-03-31	0
2001-06-30	0
2001-09-30	0
2001-12-31	0
2002-03-31	1
2002-06-30	0
2002-09-30	0
2002-12-31	0
2003-03-31	0
2003-06-30	0
2003-09-30	79
2003-12-31	0
2004-03-31	0
2004-06-30	0
2004-09-30	0
2004-12-31	0
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	1
2006-03-31	1
2006-06-30	1
2006-09-30	1
2006-12-31	1
2007-03-31	1
2007-06-30	1
2007-09-30	28
2007-12-31	13
2008-03-31	10
2008-06-30	12
2008-09-30	35
2008-12-31	28
2009-03-31	46
2009-06-30	49
2009-09-30	12
2009-12-31	11
2010-03-31	10
2010-06-30	10
2010-09-30	9
2010-12-31	8
2011-03-31	8
2011-06-30	11
2011-09-30	14
2011-12-31	62
2012-03-31	61
2012-06-30	74
2012-09-30	87
2012-12-31	116
2013-03-31	120
2013-06-30	102
2013-09-30	110
2013-12-31	53
2014-03-31	47
2014-06-30	140
2014-09-30	158
2014-12-31	33
2015-03-31	28
2015-06-30	27
2015-09-30	23
2015-12-31	44
2016-03-31	39
2016-06-30	25
2016-09-30	33
2016-12-31	32
2017-03-31	47
2017-06-30	186
2017-09-30	177
2017-12-31	174
2018-03-31	307
2018-06-30	290
2018-09-30	230
2018-12-31	214
2019-03-31	193
2019-06-30	185
2019-09-30	149
2019-12-31	184
2020-03-31	153
2020-06-30	234
2020-09-30	243
2020-12-31	233
2021-03-31	214
2021-06-30	278
2021-09-30	343
2021-12-31	330
2022-03-31	341
2022-06-30	516
2022-09-30	670
2022-12-31	622
2023-03-31	503
2023-06-30	822
2023-09-30	850