Month	US dollars
1999-09-30	0
1999-12-31	4515
2000-03-31	3798
2000-04-30	5431
2000-05-31	4370
2000-06-30	4550
2000-07-31	6502
2000-08-31	7645
2000-09-30	8102
2000-10-31	8015
2000-11-30	9440
2000-12-31	8844
2001-01-31	7992
2001-02-28	6124
2001-03-31	5543
2001-04-30	5431
2001-05-31	5993
2001-06-30	5505
2001-07-31	5558
2001-08-31	5883
2001-09-30	5949
2001-10-31	5670
2001-11-30	5914
2001-12-31	5229
2002-01-31	3830
2002-02-28	3386
2002-03-31	2970
2002-04-30	3142
2002-05-31	3417
2002-06-30	3609
2002-07-31	3946
2002-08-31	3931
2002-09-30	3558
2002-10-31	3696
2002-11-30	4240
2002-12-31	3478
2003-01-31	2633
2003-02-28	3298
2003-03-31	3432
2003-04-30	3156
2003-05-31	3053
2003-06-30	3222
2003-07-31	3751
2003-08-31	3831
2003-09-30	4872
2003-10-31	4364
2003-11-30	3971
2003-12-31	3449
2004-01-31	3768
2004-02-29	3193
2004-03-31	3507
2004-04-30	3226
2004-05-31	3148
2004-06-30	2982
2004-07-31	2922
2004-08-31	2668
2004-09-30	2625
2004-10-31	3093
2004-11-30	3507
2004-12-31	3326
2005-01-31	2811
2005-02-28	2574
2005-03-31	2491
2005-04-30	1698
2005-05-31	1491
2005-06-30	1835
2005-07-31	1705
2005-08-31	1661
2005-09-30	1585
2005-10-31	1245
2005-11-30	1371
2005-12-31	1155
2006-01-31	1155
2006-02-28	1211
2006-03-31	993
2006-04-30	1057
2006-05-31	1527
2006-06-30	698
2006-07-31	555
2006-08-31	761
2006-09-30	543
2006-10-31	836
2006-11-30	941
2006-12-31	940
2007-01-31	1141
2007-02-28	1366
2007-03-31	983
2007-04-30	918
2007-05-31	842
2007-06-30	557
2007-07-31	849
2007-08-31	1097
2007-09-30	883
2007-10-31	924
2007-11-30	755
2007-12-31	823
2008-01-31	1167
2008-02-29	1157
2008-03-31	3167
2008-04-30	4530
2008-05-31	4453
2008-06-30	3756
2008-07-31	3416
2008-08-31	3526
2008-09-30	3545
2008-10-31	3344
2008-11-30	3084
2008-12-31	1187
2009-01-31	-1225
2009-02-28	-974
2009-03-31	-2128
2009-04-30	-2276
2009-05-31	-2409
2009-06-30	-2470
2009-07-31	-2626
2009-08-31	-3040
2009-09-30	-3137
2009-10-31	-2931
2009-11-30	-2918
2009-12-31	-2916
2010-01-31	-2668
2010-02-28	-657
2010-03-31	540
2010-04-30	-671
2010-05-31	-1043
2010-06-30	-972
2010-07-31	-624
2010-08-31	-379
2010-09-30	-566
2010-10-31	-253
2010-11-30	-61
2010-12-31	534
2011-01-31	822
2011-02-28	890
2011-03-31	971
2011-04-30	1011
2011-05-31	1012
2011-06-30	1411
2011-07-31	1318
2011-08-31	1625
2011-09-30	1426
2011-10-31	2326
2011-11-30	2691
2011-12-31	2501
2012-01-31	1524
2012-02-29	837
2012-03-31	1003
2012-04-30	1432
2012-05-31	2511
2012-06-30	2818
2012-07-31	2780
2012-08-31	2272
2012-09-30	1041
2012-10-31	1965
2012-11-30	2112
2012-12-31	2123
2013-01-31	1573
2013-02-28	1635
2013-03-31	2334
2013-04-30	1011
2013-05-31	1038
2013-06-30	784
2013-07-31	404
2013-08-31	475
2013-09-30	-2
2013-10-31	-290
2013-11-30	-477
2013-12-31	-739
2014-01-31	-705
2014-02-28	-923
2014-03-31	1000
2014-04-30	-1779
2014-05-31	-776
2014-06-30	-862
2014-07-31	266
2014-08-31	-407
2014-09-30	51
2014-10-31	203
2014-11-30	-68
2014-12-31	432
2015-01-31	277
2015-02-28	1955
2015-03-31	2380
2015-04-30	2814
2015-05-31	2342
2015-06-30	306
2015-07-31	2793
2015-08-31	2241
2015-09-30	4624
2015-10-31	4147
2015-11-30	4715
2015-12-31	5121
2016-01-31	5762
2016-02-29	3731
2016-03-31	3160
2016-04-30	10692
2016-05-31	7937
2016-06-30	4180
2016-07-31	10174
2016-08-31	10942
2016-09-30	8242
2016-10-31	10915
2016-11-30	7449
2016-12-31	6781
2017-01-31	9182
2017-02-28	6709
2017-03-31	4072
2017-04-30	11170
2017-05-31	9004
2017-06-30	650
2017-07-31	9622
2017-08-31	8276
2017-09-30	2294
2017-10-31	6441
2017-11-30	2230
2017-12-31	5355
2018-01-31	11234
2018-02-28	8842
2018-03-31	2790
2018-04-30	7736
2018-05-31	11173
2018-06-30	5728
2018-07-31	8647
2018-08-31	12165
2018-09-30	5120
2018-10-31	7683
2018-11-30	2945
2018-12-31	2945
2019-01-31	5620
2019-02-28	2689
2019-03-31	657
2019-04-30	11240
2019-05-31	4749
2019-06-30	6157
2019-07-31	14580
2019-08-31	12615
2019-09-30	1051
2019-10-31	5362
2019-11-30	4608
2019-12-31	514
2020-01-31	8314