Month	US dollars
1999-08-31	0
1999-09-30	30
1999-12-31	34
2000-03-31	0
2000-04-30	0
2000-05-31	0
2000-06-30	0
2000-07-31	0
2000-08-31	0
2000-09-30	0
2000-10-31	8
2000-11-30	0
2000-12-31	90
2001-01-31	465
2001-02-28	463
2001-03-31	435
2001-04-30	751
2001-05-31	869
2001-06-30	785
2001-07-31	926
2001-08-31	862
2001-09-30	859
2001-10-31	1218
2001-11-30	1240
2001-12-31	1379
2002-01-31	1445
2002-02-28	1531
2002-03-31	1612
2002-04-30	1648
2002-05-31	1644
2002-06-30	1703
2002-07-31	1693
2002-08-31	1711
2002-09-30	1656
2002-10-31	1646
2002-11-30	1645
2002-12-31	1709
2003-01-31	1924
2003-02-28	1978
2003-03-31	2046
2003-04-30	2034
2003-05-31	2029
2003-06-30	2015
2003-07-31	2004
2003-08-31	2059
2003-09-30	2145
2003-10-31	2183
2003-11-30	2195
2003-12-31	2242
2004-01-31	2270
2004-02-29	2199
2004-03-31	2298
2004-04-30	2165
2004-05-31	2162
2004-06-30	2190
2004-07-31	2134
2004-08-31	2171
2004-09-30	2156
2004-10-31	2238
2004-11-30	2215
2004-12-31	2220
2005-01-31	2098
2005-02-28	2079
2005-03-31	2498
2005-04-30	2549
2005-05-31	2481
2005-06-30	2405
2005-07-31	2376
2005-08-31	2395
2005-09-30	2346
2005-10-31	2197
2005-11-30	2026
2005-12-31	1329
2006-01-31	1513
2006-02-28	1526
2006-03-31	1494
2006-04-30	1457
2006-05-31	1128
2006-06-30	1106
2006-07-31	1106
2006-08-31	1082
2006-09-30	1059
2006-10-31	1066
2006-11-30	1079
2006-12-31	1048
2007-01-31	1034
2007-02-28	1055
2007-03-31	1059
2007-04-30	1046
2007-05-31	1027
2007-06-30	1012
2007-07-31	1051
2007-08-31	1080
2007-09-30	1189
2007-10-31	2476
2007-11-30	3135
2007-12-31	2390
2008-01-31	2520
2008-02-29	2574
2008-03-31	2951
2008-04-30	1914
2008-05-31	1257
2008-06-30	1144
2008-07-31	799
2008-08-31	797
2008-09-30	793
2008-10-31	618
2008-11-30	274
2008-12-31	288
2009-01-31	292
2009-02-28	268
2009-03-31	264
2009-04-30	265
2009-05-31	273
2009-06-30	926
2009-07-31	1885
2009-08-31	1920
2009-09-30	2000
2009-10-31	2454
2009-11-30	2082
2009-12-31	1826
2010-01-31	1098
2010-02-28	1275
2010-03-31	1121
2010-04-30	1452
2010-05-31	1626
2010-06-30	1258
2010-07-31	748
2010-08-31	571
2010-09-30	1752
2010-10-31	2061
2010-11-30	3982
2010-12-31	3545
2011-01-31	3025
2011-02-28	2884
2011-03-31	3518
2011-04-30	3091
2011-05-31	3013
2011-06-30	3768
2011-07-31	4001
2011-08-31	4890
2011-09-30	5090
2011-10-31	4562
2011-11-30	4680
2011-12-31	3813
2012-01-31	3918
2012-02-29	3284
2012-03-31	2944
2012-04-30	2763
2012-05-31	1853
2012-06-30	1343
2012-07-31	1635
2012-08-31	1509
2012-09-30	1251
2012-10-31	1167
2012-11-30	1053
2012-12-31	1020
2013-01-31	1162
2013-02-28	1112
2013-03-31	1356
2013-04-30	1210
2013-05-31	1027
2013-06-30	1045
2013-07-31	1056
2013-08-31	1058
2013-09-30	1055
2013-10-31	1115
2013-11-30	1108
2013-12-31	1474
2014-01-31	1589
2014-02-28	1490
2014-03-31	1190
2014-04-30	1907
2014-05-31	1208
2014-06-30	1416
2014-07-31	1873
2014-08-31	1955
2014-09-30	1384
2014-10-31	1292
2014-11-30	1221
2014-12-31	1212
2015-01-31	1132
2015-02-28	1114
2015-03-31	1101
2015-04-30	1021
2015-05-31	985
2015-06-30	998
2015-07-31	986
2015-08-31	1009
2015-09-30	1019
2015-10-31	1011
2015-11-30	991
2015-12-31	1182
2016-01-31	1175
2016-02-29	1574
2016-03-31	1265
2016-04-30	1556
2016-05-31	1501
2016-06-30	1849
2016-07-31	1797
2016-08-31	1604
2016-09-30	1640
2016-10-31	1549
2016-11-30	1425
2016-12-31	1391
2017-01-31	1356
2017-02-28	1413
2017-03-31	1507
2017-04-30	1402
2017-05-31	1317
2017-06-30	1439
2017-07-31	1315
2017-08-31	1322
2017-09-30	1287
2017-10-31	1275
2017-11-30	1293
2017-12-31	1284
2018-01-31	1325
2018-02-28	1465
2018-03-31	1561
2018-04-30	1517
2018-05-31	1529
2018-06-30	1500
2018-07-31	1484
2018-08-31	3284
2018-09-30	2175
2018-10-31	2171
2018-11-30	2346
2018-12-31	2425
2019-01-31	2406
2019-02-28	2983
2019-03-31	2761
2019-04-30	2375
2019-05-31	2396
2019-06-30	2693
2019-07-31	3328
2019-08-31	3605
2019-09-30	3139
2019-10-31	3134
2019-11-30	3889
2019-12-31	4086
2020-01-31	4072