Quarter	US dollars
1999-03-31	157
1999-06-30	132
1999-09-30	131
1999-12-31	152
2000-03-31	121
2000-06-30	151
2000-09-30	158
2000-12-31	140
2001-03-31	153
2001-06-30	166
2001-09-30	198
2001-12-31	162
2002-03-31	173
2002-06-30	178
2002-09-30	194
2002-12-31	248
2003-03-31	265
2003-06-30	227
2003-09-30	243
2003-12-31	298
2004-03-31	297
2004-06-30	290
2004-09-30	329
2004-12-31	458
2005-03-31	463
2005-06-30	428
2005-09-30	356
2005-12-31	352
2006-03-31	377
2006-06-30	403
2006-09-30	350
2006-12-31	498
2007-03-31	147
2007-06-30	122
2007-09-30	139
2007-12-31	238
2008-03-31	110
2008-06-30	148
2008-09-30	209
2008-12-31	171
2009-03-31	182
2009-06-30	201
2009-09-30	120
2009-12-31	141
2010-03-31	384
2010-06-30	419
2010-09-30	402
2010-12-31	395
2011-03-31	404
2011-06-30	383
2011-09-30	292
2011-12-31	317
2012-03-31	596
2012-06-30	598
2012-09-30	492
2012-12-31	779
2013-03-31	769
2013-06-30	588
2013-09-30	580
2013-12-31	1141
2014-03-31	551
2014-06-30	677
2014-09-30	674
2014-12-31	871
2015-03-31	534
2015-06-30	524
2015-09-30	532
2015-12-31	798
2016-03-31	518
2016-06-30	400
2016-09-30	595
2016-12-31	673
2017-03-31	844
2017-06-30	855
2017-09-30	626
2017-12-31	786
2018-03-31	677
2018-06-30	330
2018-09-30	297
2018-12-31	262
2019-03-31	289
2019-06-30	288
2019-09-30	262
2019-12-31	281
2020-03-31	239
2020-06-30	255
2020-09-30	528
2020-12-31	325
2021-03-31	402
2021-06-30	333
2021-09-30	286
2021-12-31	327
2022-03-31	1180
2022-06-30	556
2022-09-30	656
2022-12-31	556
2023-03-31	570
2023-06-30	556
2023-09-30	514