Quarter	US dollars
1999-03-31	86
1999-06-30	117
1999-09-30	150
1999-12-31	137
2000-03-31	131
2000-06-30	88
2000-09-30	121
2000-12-31	114
2001-03-31	72
2001-06-30	159
2001-09-30	105
2001-12-31	74
2002-03-31	87
2002-06-30	102
2002-09-30	133
2002-12-31	114
2003-03-31	77
2003-06-30	131
2003-09-30	159
2003-12-31	62
2004-03-31	143
2004-06-30	102
2004-09-30	49
2004-12-31	76
2005-03-31	78
2005-06-30	22
2005-09-30	14
2005-12-31	33
2006-03-31	84
2006-06-30	112
2006-09-30	57
2006-12-31	48
2007-03-31	167
2007-06-30	63
2007-09-30	46
2007-12-31	254
2008-03-31	282
2008-06-30	255
2008-09-30	243
2008-12-31	265
2009-03-31	676
2009-06-30	371
2009-09-30	181
2009-12-31	154
2010-03-31	227
2010-06-30	78
2010-09-30	153
2010-12-31	37
2011-03-31	89
2011-06-30	117
2011-09-30	70
2011-12-31	30
2012-03-31	295
2012-06-30	346
2012-09-30	298
2012-12-31	333
2013-03-31	351
2013-06-30	303
2013-09-30	384
2013-12-31	230
2014-03-31	78
2014-06-30	175
2014-09-30	32
2014-12-31	85
2015-03-31	33
2015-06-30	45
2015-09-30	62
2015-12-31	31
2016-03-31	881
2016-06-30	718
2016-09-30	243
2016-12-31	89
2017-03-31	27
2017-06-30	23
2017-09-30	390
2017-12-31	32
2018-03-31	35
2018-06-30	21
2018-09-30	26
2018-12-31	15
2019-03-31	11
2019-06-30	0
2019-09-30	30
2019-12-31	19
2020-03-31	26
2020-06-30	74
2020-09-30	25
2020-12-31	55
2021-03-31	30
2021-06-30	32
2021-09-30	21
2021-12-31	9
2022-03-31	31
2022-06-30	94
2022-09-30	132
2022-12-31	100
2023-03-31	110
2023-06-30	136
2023-09-30	140