Quarter	US dollars
1999-03-31	313
1999-06-30	306
1999-09-30	325
1999-12-31	351
2000-03-31	396
2000-06-30	385
2000-09-30	415
2000-12-31	454
2001-03-31	430
2001-06-30	423
2001-09-30	451
2001-12-31	438
2002-03-31	392
2002-06-30	447
2002-09-30	452
2002-12-31	421
2003-03-31	419
2003-06-30	454
2003-09-30	539
2003-12-31	518
2004-03-31	446
2004-06-30	507
2004-09-30	591
2004-12-31	467
2005-03-31	482
2005-06-30	535
2005-09-30	535
2005-12-31	426
2006-03-31	435
2006-06-30	470
2006-09-30	408
2006-12-31	483
2007-03-31	542
2007-06-30	519
2007-09-30	887
2007-12-31	956
2008-03-31	1009
2008-06-30	1002
2008-09-30	843
2008-12-31	820
2009-03-31	571
2009-06-30	771
2009-09-30	894
2009-12-31	773
2010-03-31	807
2010-06-30	922
2010-09-30	1016
2010-12-31	913
2011-03-31	844
2011-06-30	835
2011-09-30	875
2011-12-31	848
2012-03-31	992
2012-06-30	861
2012-09-30	1153
2012-12-31	950
2013-03-31	966
2013-06-30	840
2013-09-30	977
2013-12-31	807
2014-03-31	966
2014-06-30	1107
2014-09-30	936
2014-12-31	974
2015-03-31	1061
2015-06-30	1073
2015-09-30	873
2015-12-31	811
2016-03-31	1036
2016-06-30	1093
2016-09-30	989
2016-12-31	855
2017-03-31	1098
2017-06-30	1193
2017-09-30	1384
2017-12-31	1625
2018-03-31	1602
2018-06-30	1317
2018-09-30	842
2018-12-31	973
2019-03-31	1114
2019-06-30	768
2019-09-30	965
2019-12-31	970
2020-03-31	873
2020-06-30	1090
2020-09-30	1597
2020-12-31	1262
2021-03-31	1406
2021-06-30	1334
2021-09-30	1462
2021-12-31	1443
2022-03-31	1583
2022-06-30	1322
2022-09-30	963
2022-12-31	1117
2023-03-31	1052
2023-06-30	966
2023-09-30	756