Month	US dollars
1999-08-31	-2868
1999-09-30	-3771
1999-10-31	-3974
1999-11-30	-4155
1999-12-31	-4256
2000-01-31	-4985
2000-02-29	-4951
2000-03-31	-5853
2000-04-30	-5969
2000-05-31	-5725
2000-06-30	-6676
2000-07-31	-5531
2000-08-31	-5489
2000-09-30	-5552
2000-10-31	-5054
2000-11-30	-5249
2000-12-31	-5893
2001-01-31	-4886
2001-02-28	-5076
2001-03-31	-5261
2001-04-30	-5111
2001-05-31	-4109
2001-06-30	-3866
2001-07-31	-4201
2001-08-31	-4082
2001-09-30	-4001
2001-10-31	-3981
2001-11-30	-3687
2001-12-31	-3769
2002-01-31	-4335
2002-02-28	-4282
2002-03-31	-4603
2002-04-30	-4564
2002-05-31	-4567
2002-06-30	-4680
2002-07-31	-5409
2002-08-31	-5387
2002-09-30	-5465
2002-10-31	-5909
2002-11-30	-5972
2002-12-31	-6421
2003-01-31	-6605
2003-02-28	-5999
2003-03-31	-5842
2003-04-30	-5678
2003-05-31	-6129
2003-06-30	-6666
2003-07-31	-6460
2003-08-31	-6489
2003-09-30	-6454
2003-10-31	-6809
2003-11-30	-6674
2003-12-31	-6617
2004-01-31	-6458
2004-02-29	-6581
2004-03-31	-7193
2004-04-30	-7045
2004-05-31	-6398
2004-06-30	-7213
2004-07-31	-7538
2004-08-31	-8058
2004-09-30	-8733
2004-10-31	-8653
2004-11-30	-10009
2004-12-31	-9970
2005-01-31	-12505
2005-02-28	-13531
2005-03-31	-12089
2005-04-30	-14127
2005-05-31	-14735
2005-06-30	-14991
2005-07-31	-13014
2005-08-31	-14119
2005-09-30	-14489
2005-10-31	-14448
2005-11-30	-13444
2005-12-31	-13177
2006-01-31	-13245
2006-02-28	-12404
2006-03-31	-11912
2006-04-30	-13339
2006-05-31	-14441
2006-06-30	-13367
2006-07-31	-13295
2006-08-31	-13770
2006-09-30	-15621
2006-10-31	-14749
2006-11-30	-14499
2006-12-31	-15613
2007-01-31	-14793
2007-02-28	-14158
2007-03-31	-13675
2007-04-30	-13569
2007-05-31	-14111
2007-06-30	-13656
2007-07-31	-14793
2007-08-31	-15164
2007-09-30	-17387
2007-10-31	-23069
2007-11-30	-25183
2007-12-31	-23640
2008-01-31	-25842
2008-02-29	-31443
2008-03-31	-25239
2008-04-30	-20679
2008-05-31	-17642
2008-06-30	-15490
2008-07-31	-15296
2008-08-31	-10603
2008-09-30	-10303
2008-10-31	-5346
2008-11-30	-4817
2008-12-31	-7174
2009-01-31	-8789
2009-02-28	-10438
2009-03-31	-10515
2009-04-30	-13114
2009-05-31	-11740
2009-06-30	-14592
2009-07-31	-13940
2009-08-31	-11788
2009-09-30	-11550
2009-10-31	-12413
2009-11-30	-11639
2009-12-31	-9343
2010-01-31	-10605
2010-02-28	-11371
2010-03-31	-14507
2010-04-30	-16446
2010-05-31	-15776
2010-06-30	-16559
2010-07-31	-18158
2010-08-31	-16682
2010-09-30	-15860
2010-10-31	-18199
2010-11-30	-18277
2010-12-31	-18512
2011-01-31	-13907
2011-02-28	-14625
2011-03-31	-14664
2011-04-30	-14048
2011-05-31	-12676
2011-06-30	-9468
2011-07-31	-13436
2011-08-31	-14922
2011-09-30	-16713
2011-10-31	-17686
2011-11-30	-16599
2011-12-31	-15761
2012-01-31	-14571
2012-02-29	-14936
2012-03-31	-14122
2012-04-30	-16537
2012-05-31	-16331
2012-06-30	-16907
2012-07-31	-17785
2012-08-31	-17124
2012-09-30	-17637
2012-10-31	-17247
2012-11-30	-18432
2012-12-31	-20259
2013-01-31	-17390
2013-02-28	-15385
2013-03-31	-15253
2013-04-30	-16054
2013-05-31	-16399
2013-06-30	-15629
2013-07-31	-17056
2013-08-31	-16538
2013-09-30	-16115
2013-10-31	-17302
2013-11-30	-16846
2013-12-31	-14558
2014-01-31	-16775
2014-02-28	-17485
2014-03-31	-16990
2014-04-30	-19066
2014-05-31	-15660
2014-06-30	-17761
2014-07-31	-17919
2014-08-31	-16952
2014-09-30	-15484
2014-10-31	-14945
2014-11-30	-15057
2014-12-31	-14618
2015-01-31	-13619
2015-02-28	-13495
2015-03-31	-13937
2015-04-30	-15336
2015-05-31	-14827
2015-06-30	-12872
2015-07-31	-12480
2015-08-31	-12190
2015-09-30	-12643
2015-10-31	-14118
2015-11-30	-12854
2015-12-31	-11685
2016-01-31	-10504
2016-02-29	-11504
2016-03-31	-11226
2016-04-30	-13752
2016-05-31	-13305
2016-06-30	-12332
2016-07-31	-13499
2016-08-31	-15468
2016-09-30	-16426
2016-10-31	-14840
2016-11-30	-14308
2016-12-31	-14786
2017-01-31	-13918
2017-02-28	-13633
2017-03-31	-12310
2017-04-30	-12201
2017-05-31	-13468
2017-06-30	-13454
2017-07-31	-13556
2017-08-31	-15695
2017-09-30	-16295
2017-10-31	-16122
2017-11-30	-16303
2017-12-31	-17239
2018-01-31	-15480
2018-02-28	-17523
2018-03-31	-17419
2018-04-30	-16841
2018-05-31	-16436
2018-06-30	-16182
2018-07-31	-14419
2018-08-31	-14430
2018-09-30	-11857
2018-10-31	-12599
2018-11-30	-12256
2018-12-31	-12557
2019-01-31	-9394
2019-02-28	-9255
2019-03-31	-11255
2019-04-30	-12325
2019-05-31	-11840
2019-06-30	-14834
2019-07-31	-16041
2019-08-31	-17119
2019-09-30	-17544
2019-10-31	-16519
2019-11-30	-16649
2019-12-31	-18582
2020-01-31	-17507
2020-02-29	-16914
2020-03-31	-17016
2020-04-30	-17339
2020-05-31	-21369
2020-06-30	-22476
2020-07-31	-24087
2020-08-31	-26186
2020-09-30	-27385
2020-10-31	-25527
2020-11-30	-25877
2020-12-31	-28545
2021-01-31	-24748
2021-02-28	-24472
2021-03-31	-27269
2021-04-30	-23820
2021-05-31	-20754
2021-06-30	-20268
2021-07-31	-19651
2021-08-31	-20993
2021-09-30	-20102
2021-10-31	-20560
2021-11-30	-21421
2021-12-31	-21535
2022-01-31	-19082
2022-02-28	-18490
2022-03-31	-19036
2022-04-30	-18551
2022-05-31	-17149
2022-06-30	-15442
2022-07-31	-13448
2022-08-31	-10375
2022-09-30	-8706
2022-10-31	-7665
2022-11-30	-8341
2022-12-31	-10000
2023-01-31	-9886
2023-02-28	-10135
2023-03-31	-10000
2023-04-30	-9181
2023-05-31	-8897
2023-06-30	-10494
2023-07-31	-9471
2023-08-31	-11688
2023-09-30	-9401
2023-10-31	-9472
2023-11-30	-9359
2023-12-31	-9877