Quarter	US dollars
1999-03-31	284
1999-06-30	258
1999-09-30	265
1999-12-31	255
2000-03-31	245
2000-06-30	272
2000-09-30	254
2000-12-31	218
2001-03-31	338
2001-06-30	382
2001-09-30	350
2001-12-31	331
2002-03-31	382
2002-06-30	275
2002-09-30	317
2002-12-31	264
2003-03-31	313
2003-06-30	281
2003-09-30	290
2003-12-31	323
2004-03-31	312
2004-06-30	249
2004-09-30	290
2004-12-31	294
2005-03-31	271
2005-06-30	256
2005-09-30	249
2005-12-31	543
2006-03-31	309
2006-06-30	370
2006-09-30	355
2006-12-31	389
2007-03-31	421
2007-06-30	416
2007-09-30	425
2007-12-31	369
2008-03-31	560
2008-06-30	530
2008-09-30	578
2008-12-31	422
2009-03-31	351
2009-06-30	366
2009-09-30	383
2009-12-31	438
2010-03-31	488
2010-06-30	393
2010-09-30	466
2010-12-31	393
2011-03-31	415
2011-06-30	388
2011-09-30	458
2011-12-31	531
2012-03-31	522
2012-06-30	533
2012-09-30	501
2012-12-31	489
2013-03-31	501
2013-06-30	539
2013-09-30	545
2013-12-31	550
2014-03-31	536
2014-06-30	562
2014-09-30	584
2014-12-31	549
2015-03-31	602
2015-06-30	548
2015-09-30	581
2015-12-31	574
2016-03-31	588
2016-06-30	617
2016-09-30	756
2016-12-31	697
2017-03-31	662
2017-06-30	605
2017-09-30	874
2017-12-31	748
2018-03-31	784
2018-06-30	866
2018-09-30	1187
2018-12-31	858
2019-03-31	721
2019-06-30	709
2019-09-30	674
2019-12-31	810
2020-03-31	556
2020-06-30	618
2020-09-30	687
2020-12-31	929
2021-03-31	1096
2021-06-30	845
2021-09-30	766
2021-12-31	734
2022-03-31	624
2022-06-30	707
2022-09-30	1183
2022-12-31	1087
2023-03-31	808
2023-06-30	1166
2023-09-30	765