Month	US dollars
1999-09-30	175
1999-12-31	64
2000-03-31	142
2000-04-30	65
2000-05-31	21
2000-06-30	20
2000-07-31	10
2000-08-31	10
2000-09-30	9
2000-10-31	9
2000-11-30	16
2000-12-31	16
2001-01-31	12
2001-02-28	15
2001-03-31	74
2001-04-30	10
2001-05-31	9
2001-06-30	7
2001-07-31	9
2001-08-31	13
2001-09-30	13
2001-10-31	11
2001-11-30	8
2001-12-31	12
2002-01-31	19
2002-02-28	14
2002-03-31	73
2002-04-30	3
2002-05-31	72
2002-06-30	16
2002-07-31	5
2002-08-31	7
2002-09-30	4
2002-10-31	7
2002-11-30	9
2002-12-31	4
2003-01-31	4
2003-02-28	5
2003-03-31	4
2003-04-30	1
2003-05-31	3
2003-06-30	7
2003-07-31	4
2003-08-31	2
2003-09-30	3
2003-10-31	3
2003-11-30	3
2003-12-31	1
2004-01-31	1
2004-02-29	1
2004-03-31	1
2004-04-30	0
2004-05-31	2
2004-06-30	1
2004-07-31	1
2004-08-31	2
2004-09-30	4
2004-10-31	2
2004-11-30	8
2004-12-31	2
2005-01-31	6
2005-02-28	7
2005-03-31	7
2005-04-30	8
2005-05-31	7
2005-06-30	7
2005-07-31	2
2005-08-31	2
2005-09-30	2
2005-10-31	6
2005-11-30	10
2005-12-31	9
2006-01-31	14
2006-02-28	5
2006-03-31	2
2006-04-30	7
2006-05-31	2
2006-06-30	10
2006-07-31	-3
2006-08-31	4
2006-09-30	10
2006-10-31	1
2006-11-30	1
2006-12-31	3
2007-01-31	3
2007-02-28	5
2007-03-31	2
2007-04-30	3
2007-05-31	4
2007-06-30	2
2007-07-31	5
2007-08-31	4
2007-09-30	2
2007-10-31	10
2007-11-30	13
2007-12-31	13
2008-01-31	10
2008-02-29	6
2008-03-31	3
2008-04-30	5
2008-05-31	5
2008-06-30	4
2008-07-31	2
2008-08-31	4
2008-09-30	4
2008-10-31	3
2008-11-30	3
2008-12-31	4
2009-01-31	0
2009-02-28	-1
2009-03-31	1
2009-04-30	0
2009-05-31	4
2009-06-30	2
2009-07-31	2
2009-08-31	-1
2009-09-30	2
2009-10-31	1
2009-11-30	2
2009-12-31	1
2010-01-31	1
2010-02-28	1
2010-03-31	2
2010-04-30	2
2010-05-31	2
2010-06-30	2
2010-07-31	3
2010-08-31	3
2010-09-30	4
2010-10-31	1
2010-11-30	2
2010-12-31	3
2011-01-31	1
2011-02-28	3
2011-03-31	2
2011-04-30	2
2011-05-31	2
2011-06-30	1
2011-07-31	1
2011-08-31	1
2011-09-30	1
2011-10-31	1
2011-11-30	1
2011-12-31	1
2012-01-31	0
2012-02-29	0
2012-03-31	2
2012-04-30	2
2012-05-31	2
2012-06-30	2
2012-07-31	2
2012-08-31	2
2012-09-30	2
2012-10-31	4
2012-11-30	4
2012-12-31	5
2013-01-31	4
2013-02-28	0
2013-03-31	0
2013-04-30	0
2013-05-31	2
2013-06-30	0
2013-07-31	0
2013-08-31	0
2013-09-30	-1
2013-10-31	-1
2013-11-30	95
2013-12-31	170
2014-01-31	250
2014-02-28	419
2014-03-31	513
2014-04-30	708
2014-05-31	951
2014-06-30	1226
2014-07-31	1566
2014-08-31	1523
2014-09-30	1683
2014-10-31	1963
2014-11-30	2118
2014-12-31	2114
2015-01-31	2191
2015-02-28	2206
2015-03-31	2219
2015-04-30	2518
2015-05-31	2468
2015-06-30	2100
2015-07-31	2147
2015-08-31	2006
2015-09-30	2124
2015-10-31	2233
2015-11-30	1943
2015-12-31	1794
2016-01-31	1683
2016-02-29	1801
2016-03-31	2067
2016-04-30	2324
2016-05-31	2108
2016-06-30	2634
2016-07-31	1951
2016-08-31	1874
2016-09-30	1854
2016-10-31	2213
2016-11-30	2181
2016-12-31	2455
2017-01-31	2303
2017-02-28	2141
2017-03-31	2255
2017-04-30	2496
2017-05-31	2862
2017-06-30	3303
2017-07-31	4314
2017-08-31	4758
2017-09-30	4920
2017-10-31	4406
2017-11-30	4678
2017-12-31	5144
2018-01-31	5166
2018-02-28	5436
2018-03-31	5844
2018-04-30	6132
2018-05-31	6051
2018-06-30	5948
2018-07-31	5805
2018-08-31	5944
2018-09-30	5817
2018-10-31	5631
2018-11-30	5734
2018-12-31	4989
2019-01-31	5699
2019-02-28	5370
2019-03-31	5155
2019-04-30	4855
2019-05-31	4786
2019-06-30	4786
2019-07-31	4826
2019-08-31	4841
2019-09-30	4681
2019-10-31	4963
2019-11-30	4607
2019-12-31	4449
2020-01-31	4960
2020-02-29	4254
2020-03-31	3982
2020-04-30	4166
2020-05-31	4356
2020-06-30	4055
2020-07-31	4186
2020-08-31	4693
2020-09-30	5311
2020-10-31	5095
2020-11-30	5068
2020-12-31	4687
2021-01-31	4277
2021-02-28	4036
2021-03-31	6923
2021-04-30	4257
2021-05-31	7502
2021-06-30	7473
2021-07-31	3983
2021-08-31	4050
2021-09-30	4035
2021-10-31	4365
2021-11-30	6114
2021-12-31	6319
2022-01-31	4055
2022-02-28	3703
2022-03-31	3360
2022-04-30	2739
2022-05-31	2901
2022-06-30	2358
2022-07-31	2954
2022-08-31	2740
2022-09-30	2817
2022-10-31	3989
2022-11-30	3770
2022-12-31	3593
2023-01-31	4440
2023-02-28	4406
2023-03-31	4451
2023-04-30	4529
2023-05-31	4132
2023-06-30	3368
2023-07-31	3540
2023-08-31	3680
2023-09-30	3139
2023-10-31	3416
2023-11-30	3853
2023-12-31	4177