Quarter	US dollars
1999-03-31	41
1999-06-30	37
1999-09-30	29
1999-12-31	24
2000-03-31	37
2000-06-30	42
2000-09-30	50
2000-12-31	28
2001-03-31	26
2001-06-30	29
2001-09-30	40
2001-12-31	39
2002-03-31	55
2002-06-30	98
2002-09-30	76
2002-12-31	114
2003-03-31	108
2003-06-30	97
2003-09-30	126
2003-12-31	126
2004-03-31	125
2004-06-30	148
2004-09-30	162
2004-12-31	183
2005-03-31	234
2005-06-30	218
2005-09-30	210
2005-12-31	226
2006-03-31	273
2006-06-30	288
2006-09-30	294
2006-12-31	412
2007-03-31	808
2007-06-30	808
2007-09-30	829
2007-12-31	1099
2008-03-31	1070
2008-06-30	982
2008-09-30	871
2008-12-31	404
2009-03-31	512
2009-06-30	492
2009-09-30	418
2009-12-31	351
2010-03-31	317
2010-06-30	364
2010-09-30	262
2010-12-31	303
2011-03-31	232
2011-06-30	178
2011-09-30	157
2011-12-31	142
2012-03-31	154
2012-06-30	158
2012-09-30	166
2012-12-31	151
2013-03-31	144
2013-06-30	141
2013-09-30	142
2013-12-31	83
2014-03-31	65
2014-06-30	70
2014-09-30	68
2014-12-31	106
2015-03-31	93
2015-06-30	75
2015-09-30	96
2015-12-31	84
2016-03-31	38
2016-06-30	66
2016-09-30	63
2016-12-31	47
2017-03-31	51
2017-06-30	68
2017-09-30	102
2017-12-31	50
2018-03-31	70
2018-06-30	72
2018-09-30	23
2018-12-31	71
2019-03-31	18
2019-06-30	36
2019-09-30	88
2019-12-31	65
2020-03-31	48
2020-06-30	75
2020-09-30	34
2020-12-31	80
2021-03-31	43
2021-06-30	93
2021-09-30	25
2021-12-31	46
2022-03-31	68
2022-06-30	80
2022-09-30	137
2022-12-31	276
2023-03-31	350
2023-06-30	357
2023-09-30	365