Quarter	US dollars
1999-09-30	173
1999-12-31	52
2000-03-31	180
2000-06-30	354
2000-09-30	733
2000-12-31	438
2001-03-31	529
2001-06-30	388
2001-09-30	466
2001-12-31	291
2002-03-31	255
2002-06-30	381
2002-09-30	319
2002-12-31	219
2003-03-31	299
2003-06-30	587
2003-09-30	488
2003-12-31	392
2004-03-31	224
2004-06-30	180
2004-09-30	192
2004-12-31	321
2005-03-31	236
2005-06-30	215
2005-09-30	154
2005-12-31	170
2006-03-31	435
2006-06-30	301
2006-09-30	224
2006-12-31	348
2007-03-31	420
2007-06-30	782
2007-09-30	803
2007-12-31	605
2008-03-31	702
2008-06-30	752
2008-09-30	1158
2008-12-31	2192
2009-03-31	2035
2009-06-30	2531
2009-09-30	2797
2009-12-31	2125
2010-03-31	2026
2010-06-30	1914
2010-09-30	2277
2010-12-31	1758
2011-03-31	1869
2011-06-30	2002
2011-09-30	2038
2011-12-31	1780
2012-03-31	1638
2012-06-30	1735
2012-09-30	1838
2012-12-31	1588
2013-03-31	1381
2013-06-30	1350
2013-09-30	1406
2013-12-31	916
2014-03-31	1162
2014-06-30	894
2014-09-30	1041
2014-12-31	799
2015-03-31	1222
2015-06-30	1457
2015-09-30	1222
2015-12-31	1114
2016-03-31	1224
2016-06-30	1141
2016-09-30	1089
2016-12-31	908
2017-03-31	855
2017-06-30	692
2017-09-30	542
2017-12-31	423
2018-03-31	358
2018-06-30	358
2018-09-30	447
2018-12-31	377
2019-03-31	327
2019-06-30	210
2019-09-30	511
2019-12-31	292
2020-03-31	987
2020-06-30	335
2020-09-30	249
2020-12-31	419
2021-03-31	384
2021-06-30	399
2021-09-30	320
2021-12-31	302
2022-03-31	262
2022-06-30	560
2022-09-30	893
2022-12-31	437
2023-03-31	369
2023-06-30	314
2023-09-30	308