Quarter	US dollars
1999-09-30	860
1999-12-31	816
2000-03-31	571
2000-06-30	441
2000-09-30	613
2000-12-31	514
2001-03-31	765
2001-06-30	810
2001-09-30	989
2001-12-31	985
2002-03-31	1057
2002-06-30	1114
2002-09-30	1447
2002-12-31	1593
2003-03-31	302
2003-06-30	335
2003-09-30	477
2003-12-31	648
2004-03-31	437
2004-06-30	622
2004-09-30	709
2004-12-31	920
2005-03-31	701
2005-06-30	540
2005-09-30	301
2005-12-31	278
2006-03-31	243
2006-06-30	268
2006-09-30	413
2006-12-31	391
2007-03-31	1030
2007-06-30	1904
2007-09-30	4063
2007-12-31	2491
2008-03-31	123
2008-06-30	123
2008-09-30	84
2008-12-31	92
2009-03-31	201
2009-06-30	239
2009-09-30	166
2009-12-31	210
2010-03-31	171
2010-06-30	229
2010-09-30	228
2010-12-31	161
2011-03-31	255
2011-06-30	287
2011-09-30	293
2011-12-31	345
2012-03-31	409
2012-06-30	435
2012-09-30	425
2012-12-31	469
2013-03-31	554
2013-06-30	572
2013-09-30	544
2013-12-31	560
2014-03-31	380
2014-06-30	441
2014-09-30	439
2014-12-31	382
2015-03-31	386
2015-06-30	368
2015-09-30	394
2015-12-31	405
2016-03-31	420
2016-06-30	436
2016-09-30	475
2016-12-31	534
2017-03-31	639
2017-06-30	655
2017-09-30	695
2017-12-31	825
2018-03-31	716
2018-06-30	866
2018-09-30	985
2018-12-31	1001
2019-03-31	494
2019-06-30	277
2019-09-30	233
2019-12-31	222
2020-03-31	155
2020-06-30	100
2020-09-30	115
2020-12-31	135
2021-03-31	124
2021-06-30	205
2021-09-30	218
2021-12-31	252
2022-03-31	220
2022-06-30	153
2022-09-30	145
2022-12-31	169
2023-03-31	134
2023-06-30	104
2023-09-30	146