Quarter	US dollars
1999-03-31	470
1999-06-30	470
1999-09-30	462
1999-12-31	444
2000-03-31	438
2000-06-30	460
2000-09-30	436
2000-12-31	438
2001-03-31	430
2001-06-30	458
2001-09-30	483
2001-12-31	451
2002-03-31	482
2002-06-30	497
2002-09-30	433
2002-12-31	431
2003-03-31	433
2003-06-30	429
2003-09-30	433
2003-12-31	418
2004-03-31	420
2004-06-30	429
2004-09-30	490
2004-12-31	557
2005-03-31	1360
2005-06-30	563
2005-09-30	612
2005-12-31	603
2006-03-31	608
2006-06-30	602
2006-09-30	691
2006-12-31	720
2007-03-31	643
2007-06-30	667
2007-09-30	668
2007-12-31	754
2008-03-31	671
2008-06-30	653
2008-09-30	720
2008-12-31	652
2009-03-31	594
2009-06-30	587
2009-09-30	549
2009-12-31	646
2010-03-31	579
2010-06-30	571
2010-09-30	628
2010-12-31	595
2011-03-31	581
2011-06-30	566
2011-09-30	521
2011-12-31	543
2012-03-31	435
2012-06-30	581
2012-09-30	591
2012-12-31	516
2013-03-31	491
2013-06-30	492
2013-09-30	538
2013-12-31	505
2014-03-31	490
2014-06-30	470
2014-09-30	468
2014-12-31	476
2015-03-31	446
2015-06-30	428
2015-09-30	400
2015-12-31	407
2016-03-31	424
2016-06-30	419
2016-09-30	445
2016-12-31	375
2017-03-31	411
2017-06-30	375
2017-09-30	374
2017-12-31	348
2018-03-31	361
2018-06-30	375
2018-09-30	410
2018-12-31	384
2019-03-31	377
2019-06-30	416
2019-09-30	392
2019-12-31	577
2020-03-31	583
2020-06-30	611
2020-09-30	746
2020-12-31	827
2021-03-31	860
2021-06-30	930
2021-09-30	818
2021-12-31	748
2022-03-31	877
2022-06-30	826
2022-09-30	827
2022-12-31	778
2023-03-31	814
2023-06-30	852
2023-09-30	852