Quarter	US dollars
1999-09-30	6577
1999-12-31	3425
2000-03-31	4625
2000-06-30	5485
2000-09-30	4389
2000-12-31	4813
2001-03-31	4703
2001-06-30	3519
2001-09-30	3916
2001-12-31	3954
2002-03-31	5000
2002-06-30	5247
2002-09-30	6205
2002-12-31	6929
2003-03-31	6160
2003-06-30	7376
2003-09-30	5943
2003-12-31	10092
2004-03-31	7765
2004-06-30	9020
2004-09-30	12626
2004-12-31	12424
2005-03-31	10734
2005-06-30	9258
2005-09-30	9577
2005-12-31	11060
2006-03-31	13217
2006-06-30	12487
2006-09-30	12099
2006-12-31	11736
2007-03-31	11075
2007-06-30	12322
2007-09-30	9691
2007-12-31	6444
2008-03-31	3118
2008-06-30	1235
2008-09-30	329
2008-12-31	348
2009-03-31	429
2009-06-30	281
2009-09-30	376
2009-12-31	468
2010-03-31	506
2010-06-30	206
2010-09-30	347
2010-12-31	664
2011-03-31	783
2011-06-30	663
2011-09-30	862
2011-12-31	999
2012-03-31	607
2012-06-30	591
2012-09-30	530
2012-12-31	921
2013-03-31	649
2013-06-30	687
2013-09-30	643
2013-12-31	882
2014-03-31	804
2014-06-30	747
2014-09-30	442
2014-12-31	290
2015-03-31	341
2015-06-30	385
2015-09-30	444
2015-12-31	496
2016-03-31	584
2016-06-30	608
2016-09-30	334
2016-12-31	576
2017-03-31	346
2017-06-30	477
2017-09-30	455
2017-12-31	599
2018-03-31	404
2018-06-30	616
2018-09-30	639
2018-12-31	731
2019-03-31	728
2019-06-30	689
2019-09-30	642
2019-12-31	767
2020-03-31	667
2020-06-30	682
2020-09-30	756
2020-12-31	3156
2021-03-31	1922
2021-06-30	583
2021-09-30	607
2021-12-31	3088
2022-03-31	707
2022-06-30	1661
2022-09-30	3034
2022-12-31	9976
2023-03-31	6553
2023-06-30	647
2023-09-30	493
2023-12-31	1183