Quarter	US dollars
1999-09-30	140
1999-12-31	137
2000-03-31	132
2000-06-30	159
2000-09-30	136
2000-12-31	150
2001-03-31	148
2001-06-30	135
2001-09-30	129
2001-12-31	128
2002-03-31	121
2002-06-30	111
2002-09-30	96
2002-12-31	93
2003-03-31	95
2003-06-30	97
2003-09-30	81
2003-12-31	82
2004-03-31	94
2004-06-30	112
2004-09-30	103
2004-12-31	348
2005-03-31	336
2005-06-30	314
2005-09-30	302
2005-12-31	276
2006-03-31	281
2006-06-30	309
2006-09-30	273
2006-12-31	301
2007-03-31	298
2007-06-30	32
2007-09-30	247
2007-12-31	247
2008-03-31	276
2008-06-30	24
2008-09-30	324
2008-12-31	300
2009-03-31	298
2009-06-30	306
2009-09-30	310
2009-12-31	275
2010-03-31	376
2010-06-30	278
2010-09-30	395
2010-12-31	412
2011-03-31	494
2011-06-30	605
2011-09-30	631
2011-12-31	666
2012-03-31	676
2012-06-30	631
2012-09-30	649
2012-12-31	700
2013-03-31	808
2013-06-30	749
2013-09-30	748
2013-12-31	36
2014-03-31	37
2014-06-30	39
2014-09-30	37
2014-12-31	34
2015-03-31	30
2015-06-30	30
2015-09-30	35
2015-12-31	34
2016-03-31	33
2016-06-30	28
2016-09-30	26
2016-12-31	134
2017-03-31	30
2017-06-30	38
2017-09-30	30
2017-12-31	19
2018-03-31	15
2018-06-30	30
2018-09-30	31
2018-12-31	33
2019-03-31	-20
2019-06-30	-3
2019-09-30	12
2019-12-31	15
2020-03-31	0
2020-06-30	-1
2020-09-30	8
2020-12-31	0
2021-03-31	3
2021-06-30	11
2021-09-30	7
2021-12-31	-7
2022-03-31	-3
2022-06-30	11
2022-09-30	0
2022-12-31	13
2023-03-31	-27
2023-06-30	-7
2023-09-30	-11