Quarter	US dollars
1999-03-31	347
1999-06-30	358
1999-09-30	355
1999-12-31	212
2000-03-31	611
2000-06-30	843
2000-09-30	813
2000-12-31	796
2001-03-31	562
2001-06-30	585
2001-09-30	328
2001-12-31	306
2002-03-31	352
2002-06-30	319
2002-09-30	289
2002-12-31	359
2003-03-31	327
2003-06-30	409
2003-09-30	348
2003-12-31	327
2004-03-31	423
2004-06-30	341
2004-09-30	329
2004-12-31	468
2005-03-31	577
2005-06-30	446
2005-09-30	583
2005-12-31	781
2006-03-31	727
2006-06-30	759
2006-09-30	789
2006-12-31	931
2007-03-31	1130
2007-06-30	1164
2007-09-30	877
2007-12-31	577
2008-03-31	852
2008-06-30	488
2008-09-30	686
2008-12-31	700
2009-03-31	323
2009-06-30	543
2009-09-30	527
2009-12-31	697
2010-03-31	642
2010-06-30	472
2010-09-30	435
2010-12-31	746
2011-03-31	519
2011-06-30	710
2011-09-30	550
2011-12-31	425
2012-03-31	331
2012-06-30	356
2012-09-30	527
2012-12-31	414
2013-03-31	328
2013-06-30	314
2013-09-30	307
2013-12-31	235
2014-03-31	218
2014-06-30	393
2014-09-30	349
2014-12-31	529
2015-03-31	683
2015-06-30	773
2015-09-30	661
2015-12-31	405
2016-03-31	394
2016-06-30	394
2016-09-30	595
2016-12-31	584
2017-03-31	441
2017-06-30	509
2017-09-30	438
2017-12-31	454
2018-03-31	628
2018-06-30	351
2018-09-30	445
2018-12-31	1253
2019-03-31	656
2019-06-30	479
2019-09-30	380
2019-12-31	417
2020-03-31	304
2020-06-30	246
2020-09-30	516
2020-12-31	394
2021-03-31	234
2021-06-30	292
2021-09-30	258
2021-12-31	186
2022-03-31	304
2022-06-30	247
2022-09-30	314
2022-12-31	302
2023-03-31	275
2023-06-30	494
2023-09-30	512