Quarter	US dollars
1999-03-31	304
1999-06-30	269
1999-09-30	282
1999-12-31	271
2000-03-31	233
2000-06-30	242
2000-09-30	231
2000-12-31	212
2001-03-31	216
2001-06-30	226
2001-09-30	239
2001-12-31	247
2002-03-31	218
2002-06-30	232
2002-09-30	235
2002-12-31	217
2003-03-31	255
2003-06-30	261
2003-09-30	209
2003-12-31	261
2004-03-31	231
2004-06-30	228
2004-09-30	235
2004-12-31	384
2005-03-31	356
2005-06-30	393
2005-09-30	386
2005-12-31	378
2006-03-31	381
2006-06-30	603
2006-09-30	674
2006-12-31	723
2007-03-31	591
2007-06-30	611
2007-09-30	623
2007-12-31	650
2008-03-31	711
2008-06-30	723
2008-09-30	504
2008-12-31	467
2009-03-31	380
2009-06-30	364
2009-09-30	346
2009-12-31	362
2010-03-31	513
2010-06-30	262
2010-09-30	266
2010-12-31	391
2011-03-31	426
2011-06-30	432
2011-09-30	567
2011-12-31	398
2012-03-31	478
2012-06-30	516
2012-09-30	536
2012-12-31	404
2013-03-31	355
2013-06-30	473
2013-09-30	521
2013-12-31	505
2014-03-31	446
2014-06-30	430
2014-09-30	412
2014-12-31	430
2015-03-31	510
2015-06-30	421
2015-09-30	7
2015-12-31	6
2016-03-31	7
2016-06-30	8
2016-09-30	11
2016-12-31	7
2017-03-31	6
2017-06-30	7
2017-09-30	8
2017-12-31	5
2018-03-31	7
2018-06-30	10
2018-09-30	5
2018-12-31	6
2019-03-31	8
2019-06-30	5
2019-09-30	6
2019-12-31	6
2020-03-31	6
2020-06-30	12
2020-09-30	23
2020-12-31	26
2021-03-31	23
2021-06-30	37
2021-09-30	34
2021-12-31	34
2022-03-31	36
2022-06-30	34
2022-09-30	31
2022-12-31	29
2023-03-31	27
2023-06-30	33
2023-09-30	63